PATCH: adapt .zle.sgr for CSI sequences that use : instead of ;

[Oliver Kiddle <opk@xxxxxxx>]

When trying a different terminal, I found that .zle.sgr was not working
correctly. The CSI escape sequences in terminfo for that terminal used
colon-delimited numbers rather than them being semi-colon delimited.

Variables like GREP_COLORS, LS_COLORS and JQ_COLORS need semi-colons
because they use colons to separate different fields. The whole point of
.zle.sgr is as a way to convert attributes so e.g. fg=#008700,italic is
turned into 3;38;5;28. The terminal doesn't actually care whether it gets
colons or semi-colons in the escape sequence.

So the following patch accepts colons in the input escape sequence but
produces semi-colons for the SGR value.

Oliver

diff --git a/Src/Modules/hlgroup.c b/Src/Modules/hlgroup.c
index 082762623..6c5a4bec4 100644
--- a/Src/Modules/hlgroup.c
+++ b/Src/Modules/hlgroup.c
@@ -50,9 +50,14 @@ convertattr(char *attrstr, int sgr)
 	char *c = s, *t = s - 1;
 
 	while (c[0] == '\033' && c[1] == '[') {
-	    c += 2;
-	    while (isdigit(*c) || *c == ';')
-		*++t = *c++;
+	    for (c += 2; ; c++) {
+		if (isdigit(*c))
+		    *++t = *c;
+		else if (*c == ';' || *c == ':')
+		    *++t = ';';
+		else
+		    break;
+	    }
 	    t++;
 	    if (*c != 'm')
 		break;