diff: use extended regexp to find hunk headers

Using ERE elements such as "|" (alternation) by backquoting in BRE
is a GNU extension and should not be done in portable programs.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index 5b9b074856f3b3a4d47d9e8f7ed6cd059a005d64..a733010170f489cb6945a0ec4bd98727303651d6 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1406,7 +1406,7 @@ static const struct funcname_pattern_entry *funcname_pattern(const char *ident)
 static const struct funcname_pattern_entry builtin_funcname_pattern[] = {
        { "bibtex", "(@[a-zA-Z]{1,}[ \t]*\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
          REG_EXTENDED },
-       { "html", "^\\s*\\(<[Hh][1-6]\\s.*>.*\\)$", 0 },
+       { "html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$", REG_EXTENDED },
        { "java",
          "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
          "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$",
@@ -1417,8 +1417,8 @@ static const struct funcname_pattern_entry builtin_funcname_pattern[] = {
          "|"
          "^(.*=[ \t]*(class|record).*)$",
          REG_EXTENDED },
-       { "php", "^[\t ]*\\(\\(function\\|class\\).*\\)", 0 },
-       { "python", "^\\s*\\(\\(class\\|def\\)\\s.*\\)$", 0 },
+       { "php", "^[\t ]*((function|class).*)", REG_EXTENDED },
+       { "python", "^[ \t]*((class|def)[ \t].*)$", REG_EXTENDED },
        { "ruby", "^[ \t]*((class|module|def)[ \t].*)$",
          REG_EXTENDED },
        { "tex",