Fix M4 quoting of section 3.

This fixes M4 quoting of section 3 of the input file, including escape
sequences and character constants.

Tests were added to verify the behavior in section 3 with respect to
quoting. Both escaping of quotes and quoting of potential macro-start
characters are tested. Existing tests were also fixed to account for the new -- and now correct -- behavior. Many tests relied on the old behavior of expanding M4 macros
in section 3.  They needed to be updated for the new behavior.

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/alloc_extra.l b/tests/alloc_extra.l
index ae2ae99..c974777 100644
--- a/tests/alloc_extra.l
+++ b/tests/alloc_extra.l
@@ -75,8 +75,8 @@ main (void)
     testset_in(stdin, scanner);
     testset_out(stdout, scanner);
 
-    /* Test to confirm that yyalloc was called from
-     * yylex_init_extra with the yyextra argument.
+    /* Test to confirm that testalloc was called from
+     * testlex_init_extra with the testextra argument.
      */
     check_extra(scanner);
 
@@ -86,7 +86,7 @@ main (void)
     return 0;
 }
 
-void *yyalloc(size_t size, yyscan_t scanner)
+void *testalloc(size_t size, yyscan_t scanner)
 {
     struct Check *check;
     check = testget_extra(scanner);