Item8408: Allow escaping of backslashes in macro parameters, so that …

…macro parameters may end in a backslash

git-svn-id: http://svn.foswiki.org/trunk@6152 0b4bb1d4-4e5a-0410-9cc4-b2b747904278

core/lib/Foswiki/Attrs.pm

@@ -80,7 +80,7 @@ sub new {
 
     return $this unless defined($string);
 
-    $string =~ s/\\(["'])/$MARKER.sprintf("%.2u", ord($1))/ge
+    $string =~ s/\\(["'\\])/$MARKER.sprintf("%.2u", ord($1))/ge
       ;    # escapes
 
     my $sep = ( $friendly ? "[\\s,]" : "\\s" );