style: update comment in reader.c

rrhs and rlhs were removed by b2ed6e5826.

* src/reader.c (packgram): Update comment.

THANKS

@@ -202,6 +202,7 @@ Wolfgang Thaller          wolfgang.thaller@gmx.net
 Wolfram Wagner            ww@mpi-sb.mpg.de
 Wwp                       subscript@free.fr
 xolodho                   xolodho@gmail.com
+Yuichiro Kaneko           spiketeika@gmail.com
 Zack Weinberg             zack@codesourcery.com
 長田偉伸                   cbh34680@iret.co.jp
 江 祖铭                    jjzuming@outlook.com

TODO

@@ -105,6 +105,10 @@ Rename these guys as "diagnostics.*" (or "diagnose.*"), since that's the
 name they have in gcc, clang, etc.  Likewise for the complain_* series of
 functions.
 
+*** ritem
+states/nstates, rules/nrules, ..., ritem/nritems
+Fix the latter.
+
 * Modernization
 Fix data/skeletons/yacc.c so that it defines YYPTRDIFF_T properly for modern
 and older C++ compilers.  Currently the code defaults to defining it to

src/reader.c

@@ -605,10 +605,9 @@ grammar_current_rule_expect_rr (int count, location loc)
 }
 
 
-/*---------------------------------------------------------------.
-| Convert the rules into the representation using RRHS, RLHS and |
-| RITEM.                                                         |
-`---------------------------------------------------------------*/
+/*---------------------------------------------.
+| Build RULES and RITEM from what was parsed.  |
+`---------------------------------------------*/
 
 static void
 packgram (void)