Update typo on codecs var name

Author: JoinedSenses

SPCompletions.py

@@ -271,7 +271,7 @@ def process_existing_include(self, file_name):
 
         base_includes = set()
 
-        with codec.open(file_name, 'r', "utf-8") as f:
+        with codecs.open(file_name, 'r', "utf-8") as f:
             print ('Processing Include File %s' % file_name)
             includes = includes_re.findall(f.read())