package: various fixes for syntax-check

* cfg.mk: Disable checks where needed (e.g., we do want to check the
behavior with tabs).
(sc_at_parser_check): Remove.  Unfortunately since
a11c144609 we no longer use the './'
prefix to run programs in the current directory.  That was so that we
could run Java programs like the other, although they are no run with
the `./` prefix (see 967a59d2c0).
As a consequence this sc check no longer makes sense.
However, since now AT_PARSER_CHECK passes the `./` prefix itself, this
sc-check was superfluous.
* examples/c/reccalc/scan.l: Use memcpy, not strncpy.
* src/ielr.c, src/reader.c: Obfuscate "lr(0)" so that the sc-check for
"space before paren" does not fire.
* tests/diagnostics.at: Avoid space-tab, use tab-tab.

TODO

@@ -105,7 +105,7 @@ Rename states1 as path, length as pathlen.
 Introduce inline functions for things such as nullable[*rp - ntokens]
 where we need to map from symbol number to nterm number.
 
-There are probably a significant part of the the relations management that
+There are probably a significant part of the relations management that
 should be migrated on top of a bitsetv.
 
 *** closure

cfg.mk

@@ -60,18 +60,6 @@ update-copyright-env = \
 ## More syntax-checks.  ##
 ## -------------------- ##
 
-# At least for Mac OS X's grep, the order between . and [ in "[^.[]"
-# matters:
-# $ LC_ALL=fr_FR grep -nE '[^[.]' /dev/null
-# $ LC_ALL=C grep -nE '[^[.]' /dev/null
-# grep: invalid collating element or class
-# $ LC_ALL=fr_FR grep -nE '[^.[]' /dev/null
-# $ LC_ALL=C grep -nE '[^.[]' /dev/null
-sc_at_parser_check:
-	@prohibit='AT_PARSER_CHECK\(\[+[^.[]|AT_CHECK\(\[+\./'		\
-	halt='use AT_PARSER_CHECK for and only for generated parsers'	\
-	  $(_sc_search_regexp)
-
 # Indent only with spaces.
 # Taken from Coreutils.
 sc_prohibit_tab_based_indentation:
@@ -156,11 +144,16 @@ sc_space_before_open_paren:
 ## syntax-checks exceptions.  ##
 ## -------------------------- ##
 
+# po-check: we use gnulib-po, so we don't need/want them in our POTFILE.
+generated_files =
+
 exclude = \
   $(foreach a,$(1),$(eval $(subst $$,$$$$,exclude_file_name_regexp--sc_$(a))))
+
 $(call exclude,                                                                 \
   bindtextdomain=^lib/main.c$$                                                  \
   cast_of_argument_to_free=^src/muscle-tab.c$$                                  \
+  po_check=^po/POTFILES.in$$                                                    \
   preprocessor_indentation=^data/|^lib/|^src/parse-gram.[ch]$$                  \
   program_name=^lib/main.c$$                                                    \
   prohibit_always-defined_macros=^data/skeletons/yacc.c$$                       \
@@ -169,8 +162,8 @@ $(call exclude,
   prohibit_doubled_word=^tests/named-refs.at$$                                  \
   prohibit_magic_number_exit=^doc/bison.texi$$                                  \
   prohibit_magic_number_exit+=?|^tests/(conflicts|regression).at$$              \
-  prohibit_strcmp=^doc/bison\.texi|tests/local\.at$$                            \
+  prohibit_strcmp=^doc/bison\.texi|examples|tests/local\.at$$                   \
-  prohibit_tab_based_indentation=install-icc.sh|\.(am|mk)$$|^\.git|Makefile$$   \
+  prohibit_tab_based_indentation=install-icc.sh|\.(am|mk)$$|^\.git|tests/input.at|Makefile$$   \
   require_config_h=^(lib/yyerror|data/skeletons/(glr|yacc))\.c$$                \
   require_config_h_first=^(lib/yyerror|data/skeletons/(glr|yacc))\.c$$          \
   space_before_open_paren=^data/skeletons/                                      \

examples/c/calc/calc.y

@@ -87,7 +87,7 @@ main (int argc, char const* argv[])
 {
   /* Enable parse traces on option -p.  */
   for (int i = 1; i < argc; ++i)
-    if (!strcmp(argv[i], "-p"))
+    if (!strcmp (argv[i], "-p"))
       yydebug = 1;
   return yyparse ();
 }

examples/c/reccalc/scan.l

@@ -30,7 +30,7 @@
         while (capacity < size + yyleng + 1);           \
         str = realloc (str, capacity);                  \
       }                                                 \
-    strncpy (str + size, yytext, yyleng);               \
+    memcpy (str + size, yytext, yyleng);                \
     size += yyleng;                                     \
     assert (size < capacity);                           \
   } while (0)

src/ielr.c

@@ -50,7 +50,7 @@ lr_type_get (void)
 {
   char *type = muscle_percent_define_get ("lr.type");
   LrType res;
-  if (STREQ (type, "lr(0)"))
+  if (STREQ (type, "lr""(0)"))
     res = LR_TYPE__LR0;
   else if (STREQ (type, "lalr"))
     res = LR_TYPE__LALR;

src/reader.c

@@ -763,7 +763,7 @@ prepare_percent_define_front_end_variables (void)
   {
     static char const * const values[] =
       {
-       "lr.type", "lr(0)", "lalr", "ielr", "canonical-lr", NULL,
+       "lr.type", "lr""(0)", "lalr", "ielr", "canonical-lr", NULL,
        "lr.default-reduction", "most", "consistent", "accepting", NULL,
        NULL
       };

tests/diagnostics.at

@@ -223,13 +223,13 @@ input.y: <warning>warning:</warning> fix-its can be applied.  Rerun with option
 
 AT_TEST([[Locations from M4]],
 [[%define api.prefix		{sun}
-%define api.prefix      	{🌞}
+%define api.prefix		{🌞}
 %%
 exp:;
 ]],
 [1],
 [[input.y:10.1-35: <error>error:</error> %define variable 'api.prefix' redefined
-   10 | <error>%define api.prefix      	{🌞}</error>
+   10 | <error>%define api.prefix		{🌞}</error>
       | <error>^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</error>
 input.y:9.1-37:      previous definition
     9 | <note>%define api.prefix		{sun}</note>