require whitespace or end of line after increment/decrement

this is to avoid stuff like http://somegross/url--more/garbage as being
a decrement of http://somegross/url

modules/Karma.py

@@ -34,7 +34,7 @@ class Karma(Module):
         Module.__init__(self, config, server, modlist)
 
         pattern = "(?:(\S+)|\((.+)\))"
-        karmapattern = pattern + '(\+\+|--)'
+        karmapattern = pattern + '(\+\+|--)' + '(\s+|$)'
         querypattern = '^rank\s+(.*)'
 
         self.karmare = re.compile(karmapattern)