#!/bin/sh
IXBIN=/usr/bin/iconx                                                          
IXLCL=`echo $0 | sed 's=[^/]*$=iconx='`

[ -n "$ICONX" ] && exec "$ICONX" $0 ${1+"$@"}
[ -x "$IXLCL" ] && exec "$IXLCL" $0 ${1+"$@"}
[ -x "$IXBIN" ] && exec "$IXBIN" $0 ${1+"$@"}
exec iconx $0 ${1+"$@"}

[executable Icon binary follows]
      

   t       R  R  R  R  S  T  l  U  UI9.0.00/32      :i                                                                                                                          d        '                         "     (     ,   
  2     =   	  E     O     [     a   	  m     w     |                  
                                        	          	     	            
        
            *     .     2     8     >   	  B     L   C   $   E   S      T      =          N   C   0   E   S      T      M      U   =         N   C   $   E   S      T      =          N   C   H   U   E   C      T      8   :      T      M      U      F   5   N   C   8   E   S       E   E   Q          M     V   
      N   C   8   E   S      E   E   Q          M     ]   
      N   C   X   E   S      C   4   E   E   Q          M   	  f   
   N   E   :      <         N   C   T   E   S      J   E   S         E   E   Q          M     p   
   =         N   C   8   E   S      E   E   Q          M     |   
      N   C   `   U   E   S         N   C       E   T      M           N   E   T      M   
        N   C   x   C   4   E   E   Q          M        
   N   E   :   8   T      T      M   6     M        T      =      N   C  5   U   E   S   	   T      =          N   C   S   	   ,   C     E   M        (   N   C   L   E   S   
   4   E   E   S      T      <       =         %         N   C  $   E   S         N   T      C      <      S      ,   C   ,   T      T      3   =      =      N   C       T      <       =      N   5   E   7   T      E   S   
      T   
   S      =      =      E   S   
   E      =      8   :      T   
   S      =      =      :  8   C  @   E   S         N   T      C      <      S      ,   C   ,   T      T      3   =      =      N   C       T      <       =      N   5   E   7   T   	   S      S   
   T   
   S      =      M        =      E   S      E   S   
   E         =      8   :      T   
   S      =      =      :      T      C      <      S      ,   E   E   T      =       T   
   E   S         T      =       =         T      <       =         7   T      S      E   S         =      E   S      E      =      8   :      S      =      :  1P   C  d   E   M        (   F   T      <       =      N   C     U   E   S         F   C      E   S         8   :   X   C      E   S         8   :   4   C      E   S         8   :      E   S         N   C     U   E   S         F   E   E   E   S         %   <          N   C       T      M        =      N   C  P   U   E   S      E   <      E   E   S         %   I   )      F   U   C   p   E   S      C   H   T      S      E   S      S      &   =      N   M        :      M           N   T      C   0   E   S      <         N   M     $   :      M      U   T      E   S      S      &   S      =      =      N   5   N   T      M     &   =      N   C  <   U   C      E   S         8   :      E   S         N   C       T      M     ,   =      N   C   @   T      T      E   S         M     2   =      =      N   C       T      M     8   =      N   C   @   T      T      E   S         M     :   =      =      N   T      M     @   =      N   E   S      E   S      E   S      E   S      E               N   T      =       :  ,   C      E   M     F   (   N   C      E   S      <         N   C      E   S      E      N   C       E   S      E   A          N   C      E   S      E      N   C   (   T      T      M     S   =      N   E   S      M     Y      :  +   C  |   E   M   
  `   (   N   C     C     E   S         N   C   4   E   S      E   S      E   S         &      N   U   C      E   S         8   :      C      E   S         8   :   h   J   E   S         C   4   E   E   E   S         %   <          8   :      E   S         =      N   C   l   U   E   S      M     Y   
   N   C       T      M     k   =      N   E   S      M   
  ~      N   C       E   S      M           N   C     U   E   S      E   <      E   E   S         %   I   )      F   U   C   p   E   S      C   H   T      S      E   S      S      &   =      N   M        :      M           N   C      E   S      C   d   E   E   E   S         %   <         N   E   E   M        S         M           :      M      U      N   C   \   T      S      T      E   S      S      &   E   S      S         =      =      N   E   S      M           N   5   N   C   $   E   S      E   S         &   N   C      U   E   E   E   S         %   <          F   C      E   S         8   :      E   S         N   T      M        =      N   C   h   E   S      C   @   E   E   E   S         %   <          N   M        :      M           N   C   h   E   S      C   @   E   E   E   S         %   <          N   M        :      M           N   C  H   C      E   S         N   C      E   S         N   T      T      S      S      =      M        T      S      M        =      M        =      :   <   T      T      S      S      =      M        =      :   T   U   E   S         N   T      T      S      S      =      M        =      N   C      U   C      E   S         8   :   L   C      E   S         8   :   (   E   E   E   S         %   <          N   T      M        =      N   C   8   U   E   S         N   T      M   7     =      N   C       T      M        =      N   E   S      E   S      E   S      E   S      E   S      E                  :      E   N   C      E   S      S         N   C      E   S      <         N   T      S      T      =      :  #`   C     E   M     "   (   N   C      T      S      S      M     )   E   S      T      <       =         E   E   S      S      &   M     -      =      N   C   ,   T      S      E   S         =      N   C   4   E   S      E   E   S      S      &         N   C      E   S      <         N   C   @   U   E   C      S      8   :      S      E      F   5   N   E   E   S      S      &   M     /      :  !   C      E   M     1   (   N   C   h   U   E   S         N   T      C   (   E   S         N   M        :      M     >   =      N   C      E   S      E      N   E   S   
   <          :      C   |   E   M   
  C   (   N   C   @   T      T   
   E   S         M     N   =      =      N   E   S      E      :   P   C      E   M     P   (   N   C   H   T      S      S      M        T      <       =      =      N   U   E   C      S      8   :      S      E      F   5   :     C  l   E   M     V   (   N   C      C      E   S       T      T      3   =      =         N   C      T      <      =      N   E   S   !   T      <       =         :   H   C   ,   E   S       T      <       =         N   E   S   !   E      N   U   S       6   C   t   -   M     ]      N   F   C   0   T      M     ]   E   S         =      N   E   S      S   !      :     C   t   -   M     >      N   F   C   0   T      M     >   E   S         =      N   E   S      S   !      :  X   C   <   -   M     c      N   F   E   S      S   !      :     C   <   -   M     k      N   F   E   S      S   !      :     C   @   -   M   	  s      N   F   E   S      E   A          :     C   D   -   M     }      N   F   T      S      S   !   =      :  <   C   T   -   M           N   F   E   E   S      E   S         &   S         :     C   <   -   M           N   F   E   S      S   !      :     C   h   -   C      M   	     8   :   ,   C      M        8   :      M           N   F   E   :  ,   C   H   -   M           N   F   T      T      M        =      :     C  p   -   M   
        N   F   C       T      M        =      N   C       E   S   "   M           N   C      E   S   #   <          N   C      S   !   ,   C   <   E   S   $   T      T      3   =      =         N   C      E   M     $   (   N   E   T      T      <       =         7   N   T      E   S   $   M        T      =      :  d   C      -   M           N   F   C   h   T      S   "   T      S   !   E   M        E   S   #   4   <               =      =      N   E   S   "   M           :     C      -   M   	        N   F   C   h   T      S   "   T      S   !   E   M     8   E   S   #   4   <               =      =      N   E   S   "   M           :      C   4   -   M           N   F   T      =       :      C   H   -   M   	        N   F   T      M        T      =      :   h   F   C      E   S   !      8   :      M      U   ,   T      E   M        S          =      7   :  (   C     E   M        (   N   U   E   S         N   C      C      E   S       T      T      3x   =      =         N   C      T      <      =      N   E   S   !   T      <       =         :   H   C   ,   E   S       T      <       =         N   E   S   !   E      N   U   S       6   C   H   -   M   
        N   F   T      T      M        =      :     C     -   M   
        N   F   C       T      M        =      N   C       E   S   "   M           N   C      E   S   #   <          N   C      S   !   ,   C   <   E   S   $   T      T      3ڈ   =      =         N   C      E   M     $   (   N   E   T      T      <       =         7   N   T      T   	   E   M        T   
   T      =         S   $   T      M     "   =      =      :     C      -   M     $      N   F   C   h   T      S   "   T      S   !   E   M        E   S   #   4   <               =      =      N   E   S   "   M           :      C      -   M   	  -      N   F   C   h   T      S   "   T      S   !   E   M     8   E   S   #   4   <               =      =      N   E   S   "   M           :  h   C   4   -   M     7      N   F   T      =       :  ,   C   H   -   M     @      N   F   T      M        T      =      :  
   C   \   -   M     I      N   F   C      E   S   
   S         N   E   S      E      :  
x   C   `   -   M     M      N   F   U   E   C      S      8   :      S      E      F   5   :  
   C   `   -   M   	  R      N   F   U   E   C      S      8   :      S      E      F   5   :     C   (   -   M     \      N   F   E   :  x   C  	L   -   M   	        N   F   U   E   S         N   C     C     E   S         N   C   4   E   S      E   S      E   S         &      N   U   C      E   S         8   :      C      E   S         8   :   h   J   E   S         C   4   E   E   E   S         %   <          8   :      E   S         =      N   C   l   U   E   S      M     Y   
   N   C       T      M     k   =      N   E   S      M   
  ~      N   C       E   S      M           N   C     U   E   S      E   <      E   E   S         %   I   )      F   U   C   p   E   S      C   H   T      S      E   S      S      &   =      N   M        :      M           N   C      E   S      C   d   E   E   E   S         %   <         N   E   E   M        S         M           :      M      U      N   C   \   T      S      T      E   S      S      &   E   S      S         =      =      N   E   S      M           N   5   N   C   $   E   S      E   S         &   N   C      U   E   E   E   S         %   <          F   C      E   S         8   :      E   S         N   T      M        =      N   C   h   E   S      C   @   E   E   E   S         %   <          N   M        :      M           N   C   h   E   S      C   @   E   E   E   S         %   <          N   M        :      M           N   C  H   C      E   S         N   C      E   S         N   T      T      S      S      =      M        T      S      M        =      M        =      :   <   T      T      S      S      =      M        =      :   T   U   E   S         N   T      T      S      S      =      M        =      N   C      U   C      E   S         8   :   L   C      E   S         8   :   (   E   E   E   S         %   <          N   T      M        =      N   C   8   U   E   S         N   T      M   7     =      N   C       T      M        =      N   E   S      E   S      E   S      E   S      E   S      E                  :      E   N   C      C      C      E   S   %      8   :      E   S         N   C   l   U   E   S      M     Y   
   N   C       T      M     k   =      N   E   S      M   
  ~      N   T      M     _   =      :      T      M     h   =      N   E   S   "   M      U      :  $   C   (   -   M     u      N   F   E   :     C  @   -   M           N   F   U   E   S         N   C      T      S   "   T      E   M        T   
   S   !   =         T      M        T   
   S   !   =      =      =      =      N   E   S   "   C   L   C      E   S   %      8   :      E   S         N   M        :      M   	  |      :     C      -   M           N   F   U   E   S         N   T      C   L   C      E   S   %      8   :      E   S         N   M        :      M        =      :      C      -   C      M   	  s   8   :   L   C      M   	     8   :   ,   C      M     }   8   :      M           N   F   E   :   h   F   C      E   S   !      8   :      M      U   ,   T      E   M        S          =      7   :     C      E   M        (   F   T      <       =      N   C      E   S      <         N   T      T      M        =      :     C      E   M   	     (   F   T      <       =      N   C      E   S      S         N   T      M        T      =      :     C      E   M        (   N   C   ,   E   S   &   T      <       =         N   U   E   C      S      8   :      S      E      F   5   :  d   C   H   E   M   	     (   N   T      T      <       =      =      :     C   `   E   M   
     (   N   T      M        T      <       =      M     
   =      :     C   X   E   M   
  #   (   F   T      <       =      N   T      M     1   =      :  L   C   @   T      M     @   =      N   T       <      =      :     C      E   M     H   (   N   T      <      T      C   $   T      3p   =      8   :      <       =      C   $   T      <       =      8   :      T      <      =      =      =      :   4   T      M      J   T      <       =      =      7   N   :ʄ   N   C      T      =       N   E   D      $  :                         C     U   E   T      =       <      ?   C  L   E   E   E   E   E   E   E   M     k   (   T      =          C   8   E   E   M     m   (   T      =          8   :      M      U      C   4   T      T      >      =      =      8   :      E   M     o   (      T      T      M     s   =      =         E   M     s   (      T      =          8   :      M      U   B      H   F   5   N   E   D                                                  @                                                                       @                                                                     $  =`                   
      C     C      C       T   !   3   =      N   5   E   F   T      3   =      N   U   T      T      3   =      =      H   F   5   :  X   C      T   !   3   =      F   T      3   =      N   U   E   T      T      3h   =      =      E   M     w   (      H   F   5   :     C      C   @   T   !   3   =      F   T      3   =      8   :      T   !   3   =      N   J   T      >      M   2  y   T   "   T      <       =      =      =      5   =      :      C      T   !   3   =      N   J   T      >      M   %     T   "   T      <       =      =      M   "     =      5   =      :   X   C   (   T      <       =      N   D   :   (   U   T      <       =      H   F   5   N   E   D                                          $  @                      *   C   \   U   C   4   T      T      3   =      =      8   :      M      U   H   F   5   N   E   D      $  A<                      3   C   4   C   $   <      ?   T      =       B   G   D   N   E   D      L  A                  
   <     ]     >                   C   (   E   E   Q         M      U      N   C      T      T   	   Q       Q      T      Q      E   E   E   M         T      Q      =         M           Q         =      M        =      =      N   C      C      E   G   D   N   E   D      <  C                    G          ]     
   ;   ,   C   $   E   R       T      =          N   C      U   C   (   T      R       Q       =      N   5   E   N   C   $   T      R       Q       =      N   C   (   T      >      M   8     =      N   T      >      M     J   Q       M     $   Q      =      N   C      C      E   G   D   N   E   D      L  D                   X     ]     >     ]          f   C   L   E   S       C   (   E   Q         N   M      U   :      T         N   C   |   E   S       4   C   L   C      E   Q          8   :      E   Q         N   M     h   :      M      U         N   C   P   E   S       4   E   M     k   T   "   E   Q          =               N   C   d   E   S       4   E   M     r   T   "   E   M     y   E   Q            =               N   C   |   E   S       4   C   L   C      E   Q          8   :      E   Q         N   M     s   :      M      U         N   C   T   E   S       4   C   (   E   Q         N   M      U   :      T            N   C   $   E   S       4   Q            N   C   T   E   S       4   C   (   E   Q         N   M      U   :      T            N   C   |   E   S       4   C   L   C      E   Q          8   :      E   Q         N   M     {   :      M      U         N   C   T   E   S       4   C   (   E   Q         N   M      U   :      T            N   C      C      S       G   D   N   E   D      <  H                 	   d     ]     ]        C   @   C   0   T   	   Q       E   Q      Q      =      G   D   N   E   D      4  Il                    n     >     ]   C   D   C   4   T   	   E   Q       Q      M        =      G   D   N   E   D      4  I                    u          f   C      C   |   E   E   E   E   E   E   M     k   Q          M     s      Q         M           Q          M     s      G   D   N   E   D                                             D  J                  ~          f             ;     C     C   $   E   R      T      =          N   C   4   E   E   R      M     u   &   M           N   C   4   E   E   R      M     k   &   M            N   C   4   E   E   R      M     s   &   M           N   C   4   E   E   R      M        &   M           N   C      E   R      3L      N   U   E   R      4   T   #   R      =      *      F   5   N   C       E   S       M      U      N   C      Q       ,   C      U   E   S       4   T      T      R      =      =            N   C   E   S       4   E   R      T      <      =      &         N   :d   N   C   ,   E   S       T      <       =         G   D   7   N   E   D                                            4  N                
        f        C       E   S       M      U      N   C  T   Q       ,   C      U   E   S       4   T      T   $   M        =      =            N   C   C   H   C       E   M        (   8   :      T      M        =      N   C   \   E   S       4   E   M        T      T   $   M        =      =               N   C   T   E   S       4   T      E   T      3$   =      <         =            N   C   `   C       E   M        (   8   :   4   T      M        T   "   Q       =      =      N   E   S       4   M              N   :   N   C   ,   E   S       T      <       =         G   D   7   N   E   D      4  P                             
   ;   ,   C   $   E   R      T      =          N   C      U   C   (   T      R      Q       =      N   5   E   N   C   T   T      >      M        Q       M     $   T      <       =      =      N   T      R      Q       =      N   C      C      E   G   D   N   E   D      ,  R                          C   @   T      E   E   >      M         A      Q       	   Y   N   C      T       <      =      N   E   D         P                  :    =<    @    A    A    B԰    DP    H    I8    I    J    M    P    Q        Ȱ      ְ  Ͱ  ߰  Ӱ    Ұ  ɰ  Ѱ  ԰        ڰ                     
         
         *      3   
   <      G      X   	   d      n      u      ~   
                                                                                                                               
                                                  
           4    < 
                	               @    P    X -   l 
            "            
           (     P     p 2      !    !   & !   
 #    %     %  8 * %  T  [   1 [   + [   $ [     [    \    c    c    c  < $ c  P  c  h 
 d  | ' d   	 d    e    e    c   ; ]   # ]   # ^    |  <  |  D  |  h $ |  |  |   : }    }   $ ~   ! ~    ~    |   ; _   # _  D  l  X  l  t  m   . m    m    l   8 m   2 m    l    n   	 n    o    o    l  	 # a  	4    	L    	p %  	 %  	 !%  	 0%  	 ?%  
 *  
, *  
0 *  
< *  
` 	+  
 ,  
 ,  
 ,  
 ,  
 .-    -  , -  X .   6.   -.   .   	0   2    2  D 	3  t 4   4   	4   	5   6   6   	6  
 	7  
X ;'  
\ 8'  
` -'  
d '  
h '  
x     
  ?  
   ?  
 6 ?  
 3 ?   
_   
_  ( `  , 	`  X ! A  | 8 A    B   :   ;   ;    ;    <  D <  d %<   5<   4<   ?<   E<   $<   
e   	f  , 	g  T W   X   X   X   	X   ,Y   Y   
Y  T Z  X Z  d Z   ,Z   1Z   
Z   $[   0[   [   	[  4 
\  d ?  h ?   	@   @   @   @   )@   
A  0 B  4 
B  @ B  h B   C   
C   C   C   D   
E  @ F  p G   F   I   I   
K   L  $ L  P M  t M   'M   &M   1M   
N   O   
P  , 
Q  t IR  x FR  | ;R   /R    R   R   U     C   4 C   ! D  $    t 6   | 0    @    L    %    /    !    3    '     $   D '    &   #        ,     K     K  $ 9 K  L 5 K  l ) L  p & L     M    S   + S   * S     S   , T   ) T  4    x J    %    &   #      $    ,    4 
   T &   | 5    /                     

  8   <   \ I
   
         E   
     @ 

  ` 
   
         
      
  @   D   P '  t 
      %m   'm  ( p  P p  x q   q   )q   8q    r   8 *r   @ %r   H r   h 2r    Cr    =r    r    s    s    t  !L ;t  !T 1t  !X 't  !` t  ! Lt  ! u  " ;u  " 1u  " 'u  " u  "< Lu  "` v  "t v  " w  " w  "   #   #, 0  #0 '  #8   #\   #t   #   #   #   # (  $ 7  $ 1  $@   $H   $\ "  $`   $ y  $ y  $ z  % z  %4 )z  %X 8z  %p {  % *{  % %{  % {  % 2{  % C{  % ={  &  {  &8 >|  &@ -|  &` %|  &h |  & }  & ;}  & 1}  & '}  '  }  '$ L}  'H ~  ' ;~  ' 1~  ' '~  ' ~  ' L~  (    (   (<   (d   ( 
  (   ( =  ( :  ( 
  )( &  ), #  )X 
  ) &  ) #  ) 
  )   ) 
  *   *0 :  *d ;  *h ;  *l ;  * <  * <  * %<  * 5<  * 4<  +  ?<  + E<  +  $<  +P 
e  +t 	f  + 	g  + W  + X  ,  X  , X  , 	X  ,X ,Y  ,\ Y  , 
Y  , Z  , Z  , Z  , ,Z  - 1Z  - 
Z  -X $[  -p 0[  -t [  -| 	[  - 
\  - ?  - ?  - 	@  .  @  . @  .( @  .D )@  .` 
A  . B  . 
B  . B  . B  / C  / 
C  / C  /D C  /h D  / 
E  / F  / G  / F  0  I  04 I  0T 
K  0| L  0 L  0 M  0 M  1 'M  1 &M  1 1M  10 
N  1T O  1p 
P  1 
Q  1 IR  1 FR  1 ;R  1 /R  1  R  1 R  2  U  2,   2H !  2t 
e  2 	f  2 	g  2   2   3    3D 
  3P   3t 
  3   3 >  3 -  4 @  4 )  4 %  4    4T   4p *  4   4 
  4   5   5  '  5H   5 3  5 5  6    6   6@ 3  6D )  6L   6p    6    6 +   6 :   6    7    7< +   7` :   7    7 5   7 /   7 &  7 #  8     8@ 0   8H ,   8p    8 "   8    8    8    9    9< 	 4  9X  5  9  6  9  7  9  7  9 ' 7  : 1 7  :   7  :(  7  :\ 0 9  :d  9  :l * %  :  (  :  )  :    :    : @   ;$    ;0     ;8    ;X '   ;d 7   ;l ,   ; #   ;    ;    ;    ; *   ; @   ;    <    < 2   <  &   <$ #   <0 =   <8 +   <X    <\    <p    =`    = 
   =    =    =    =    >    >0    >\    >d    >|     >    >    >    >    > '   ?    ?< T   ?D P   ?L    ?T    ?X    ?    ?    ? G   ? C   ?    ? 5   ?    @    @     @@    @H    @\    @    @    @    A     A    A<    AT    Al    A|    A    A    A    B\ 8   Bd +   Bt ?   B I   B    B    B 	   B    B    C   C4   C<   Cp   C   C   C 
  C   D 
  D< !  DL "  D   D 
  D   E$ 
  E@   Eh   E   E   E   E   F #  F    F    F(   F,   Fl 
  F   F   F 
  G   G8   Gp 
  G   G 
  G   H   HP 
  Ht   H   H   H   I   I   I$   I4   Il   I   I   I   I   I   J0   J@   JL   J\ !  Jh )  Jx 0  J|   J   J   K(   K0   K\   Kl   K   K   K   K   L   L    LD   Lp #  Lx   L   L   L   M   M 
  ML   MT   MX 	  M   M   M   M   M   N   N4   NL   N   N   N 
  N   N   O@ "  OH   OP   OT 	  O   O   O   O 	  O   P 7  P   P@ 	  P|   P   P   P   P   P    P   Q    Q4   Q\   Q C  Q 
  Q   Q   Q   R    R8   RL 
  R\ /  R 
  R main braw eraw skip_white_tags skip_chars optwhite thewhite writechunk warn_unused_xref linklabelto linklabel linkto sgmlwrap escapeSpecials convquotes warn_unknown fatal table set write read tab writes many pos insert member upto move put name match exit any image key find tohtml.nw args delay raw where localindex noindex shortxref useitemstab defns defns_above inputline text line code lastindexref quoting lastxreflabel pendinguses pendingprev pendingnext notused useitems i usedir thischunk ecode useprefix usesuffix p n nil previscode lastxrefref fun arg comma count ref uglyindex filename  -delay -noindex -longxref -localindex -raw \begin{rawhtml} \end{rawhtml} -no-gen-comment <!-- this file was generated automatically by noweave;  better not edit it--> @text   	 bare @nl  <b>( &lt;-U U-&gt;   )</b>  <b>[ &lt;- D -&gt; ]</b> @begin code  <pre> </pre> @end code  </pre><blockquote> </blockquote> Used  above below  ( ) ,  ;  previous Previous next Next  and   definitions  definition . <br>
This code is written to a file (or else not used). <p> @defn  dfn = + @begin docs  \par @end docs  * @use  @xref  label prevdef nextdef beginuses useitem enduses begindefs defitem enddefs beginchunks <ul> chunkbegin <li> :  chunkuse U chunkdefn chunkend endchunks </ul> xref  @index  beginindex entrybegin NWI- b entryuse entrydefn entryend endindex use defn localdefn nl Defines  <hr><b>[</b> isused <b>,</b>   (links are to index).<p> <b>]</b> isdefined index  @quote <code> @endquote </code> @file  @literal  @header html  <html><head><title> </title></head><body> @trailer html </body></html> @fatal  @ Botched line in noweb pipeline:  < / !-- > & ; broken skip_chars, report to nr@eecs.harvard.edu:  warning: can't find end of HTML tag:  
	quoted code embedded in comment? tag suffix &lt; &gt; warned Warning: internal inconsistency in noweb (not urgent)--- 	never used @xref  contents s <a  name=  href= # </a> </ l escapes specials &amp; " &quot; r [[ impossible missing [[ ]] ] impossible missing ]] in  Warning: unrecognized escape @ L noweb error in tohtml:  