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, 4 insertions, 4 deletions

diff --git a/tests/c_cxx_nr.lll b/tests/c_cxx_nr.lll
index c9e0fb6..24a73d7 100644
--- a/tests/c_cxx_nr.lll
+++ b/tests/c_cxx_nr.lll
@@ -48,10 +48,10 @@ int main(void);
 int
 main ()
 {
-    yyin = stdin;
-    yyout = stdout;
-    yylex();
-    yylex_destroy();
+    testin = stdin;
+    testout = stdout;
+    testlex();
+    testlex_destroy();
     printf("TEST RETURNING OK.\n");
     return 0;
 }