X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b1a4261e6d2c8b5eecf2f7be8c920f0a83feee42..d45708d4184fe4f1f6e5abd0e0bfaa18eff02f61:/src/scan-gram.l

diff --git a/src/scan-gram.l b/src/scan-gram.l
index 683d5822..61716810 100644
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -1,7 +1,6 @@
 /* Bison Grammar Scanner                             -*- C -*-
 
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2009 Free Software
-   Foundation, Inc.
+   Copyright (C) 2002-2007, 2009-2010 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -438,12 +437,9 @@ splice	 (\\[ \f\t\v]*\n)*
   }
   \\(.|\n)	{
     char const *p = yytext + 1;
-    char quoted_ws[] = "` '";
-    if (isspace (*p) && isprint (*p))
-      {
-        quoted_ws[1] = *p;
-        p = quoted_ws;
-      }
+    /* Quote only if escaping won't make the character visible.  */
+    if (isspace ((unsigned char) *p) && isprint ((unsigned char) *p))
+      p = quote (p);
     else
       p = quotearg_style_mem (escape_quoting_style, p, 1);
     complain_at (*loc, _("invalid character after \\-escape: %s"), p);