maint: fix comment typos

Using http://github.com/lyda/misspell-check, massage its
output into sed commands to perform the suggested changes.
Initially, I filtered out the THRU->Through changes, because
that failed to retain capitalization in the grammar token.
Instead, do this manually, beforehand:

sed -i s/THRU/THROUGH/ tests/existing.at
git ls-files|misspellings -f -|perl -nl \
  -e '/^(.*?)\[(\d+)\]: (\w+) -> "(.*?)"$/ or next;' \
  -e '($file,$n,$l,$r)=($1,$2,$3,$4); $q="'\''"; $r=~s/$q/$q\\$q$q/g;'\
  -e 'print "sed -i $q${n}s!$l!$r!$q $file"'|bash

ChangeLog-2012

@@ -8196,7 +8196,7 @@
 	(PERCENT_LEX_PARAM, PERCENT_PARSE_PARAM): Remove the {...} part,
 	which is now, again, a separate token.
 	Adjust all dependencies.
-	Whereever actions with $ and @ are used, use translate_code.
+	Wherever actions with $ and @ are used, use translate_code.
 	(action): Remove this nonterminal which is now useless.
 	* src/reader.c: Include assert.h, scan-gram.h and scan-code.h.
 	(grammar_current_rule_action_append): Use translate_code.
@@ -9382,10 +9382,10 @@
 
 	* Makefile.am: DJGPP specific files added to EXTRA_DIST.
 	* djgpp/Makefile.maint: Fix PACKAGE variable computation.
-	* djgpp/config.bat: Replace every occurence of the file name
+	* djgpp/config.bat: Replace every occurrence of the file name
 	scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
 	c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
-	* djgpp/config.sed: Replace every occurence of the file name
+	* djgpp/config.sed: Replace every occurrence of the file name
 	scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
 	c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
 	* djgpp/djunpack.bat: DJGPP specific file.
@@ -12658,7 +12658,7 @@
 	(YYERROR): Goto to yyerrorlab, not yyerrlab1.
 	(yyerrlab1): Remove, but where it used to be (now the bottom part of
 	yyerrlab), when hitting EOF, pop the whole stack here instead of
-	merely falling thru the default error handling mechanism.
+	merely falling through the default error handling mechanism.
 	(yyerrorlab): New label, with the old contents of YYERROR,
 	plus the following change: pop the stack of rhs corresponding
 	to the production that invoked YYERROR.  That is how Yacc
@@ -16380,7 +16380,7 @@
 
 2002-07-30  Akim Demaille  <akim@epita.fr>
 
-	`stage' was accidently included in a previous patch.
+	`stage' was accidentally included in a previous patch.
 	Initiate its autoconfiscation.
 
 	* configure.in: Look for malloc.h and sys/times.h.
@@ -19383,7 +19383,7 @@
 	(insert_accepting_state, augment_automaton): Remove, since now
 	these states are automatically computed from the initial state.
 	(generate_states): Adjust.
-	* src/print.c: When reporting a rule number to the user, substract
+	* src/print.c: When reporting a rule number to the user, subtract
 	1, so that the axiom rule is rule 0, and the first user rule is 1.
 	* src/reduce.c: Likewise.
 	* src/print_graph.c (print_core): For the time being, just as for

data/yacc.c

@@ -197,7 +197,7 @@ m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
        `yyvs': related to semantic values.]b4_locations_if([[
        `yyls': related to locations.]])[
 
-       Refer to the stacks thru separate pointers, to allow yyoverflow
+       Refer to the stacks through separate pointers, to allow yyoverflow
        to reallocate them elsewhere.  */
 
     /* The state stack.  */

djgpp/README.in

@@ -179,7 +179,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 	This will install the products into your DJGPP installation tree given
 	by the default prefix "/dev/env/DJDIR".  If you prefer to install them
-	into some other directory you will have to set prefix to the appropiate
+	into some other directory you will have to set prefix to the appropriate
 	value:
 	  make install prefix=z:/some/other/place
 

djgpp/config.bat

@@ -471,7 +471,7 @@ redir -e /dev/null rm %XSRC%/po/stamp-cat-id
 
 Rem Update the arguments file for the configure script.
 Rem We prefer without-included-gettext because libintl.a from gettext package
-Rem is the only one that is garanteed to have been ported to DJGPP.
+Rem is the only one that is guaranteed to have been ported to DJGPP.
 echo --enable-nls --without-included-gettext >> args
 goto ConfigurePackage
 

doc/Doxyfile.in

@@ -982,7 +982,7 @@ CLASS_GRAPH            = YES
 COLLABORATION_GRAPH    = YES
 
 # If the UML_LOOK tag is set to YES doxygen will generate inheritance and
-# collaboration diagrams in a style similiar to the OMG's Unified Modeling
+# collaboration diagrams in a style similar to the OMG's Unified Modeling
 # Language.
 
 UML_LOOK               = NO

src/parse-gram.c

@@ -1925,7 +1925,7 @@ YYLTYPE yylloc;
        `yyvs': related to semantic values.
        `yyls': related to locations.
 
-       Refer to the stacks thru separate pointers, to allow yyoverflow
+       Refer to the stacks through separate pointers, to allow yyoverflow
        to reallocate them elsewhere.  */
 
     /* The state stack.  */

tests/existing.at

@@ -1478,7 +1478,7 @@ AT_TEST_EXISTING_GRAMMAR([[GNU pic (Groff 1.18.1) Grammar]],
 %token RAND
 %token SRAND
 %token COPY
-%token THRU
+%token THROUGH
 %token TOP
 %token BOTTOM
 %token UPPER
@@ -1604,12 +1604,12 @@ placeless_element:
 		{}
 	  DELIMITED
 	| COPY TEXT
-	| COPY TEXT THRU
+	| COPY TEXT THROUGH
 		{}
 	  DELIMITED
 		{}
 	  until
-	| COPY THRU
+	| COPY THROUGH
 		{}
 	  DELIMITED
 		{}

tests/local.at

@@ -619,7 +619,7 @@ main (void)
 # In some versions of Autoconf, AT_CHECK invokes AS_ESCAPE before
 # expanding macros, so it corrupts some special characters in the
 # macros.  To avoid this, expand now and pass it the result with proper
-# string quotation.  Assume args 7 thru 12 expand to properly quoted
+# string quotation.  Assume args 7 through 12 expand to properly quoted
 # strings.
 
 m4_if(m4_index(m4_quote($3), [no-xml]), -1,