Changed opening quote check and comment for clarity

Author: kmvanbrunt

cmd2.py

@@ -2087,9 +2087,9 @@ def complete(self, text, state):
                         # Join all matches into 1 string for ease of searching
                         all_matches_str = ''.join(self.completion_matches)
 
-                        # If there is a tab completion that will alter the text on the command line and
-                        # any of the matches have a space, then we must add an opening quote to the matches.
-                        if common_prefix != text and ' ' in all_matches_str:
+                        # If the tab completion will extend the text on the command line and any of
+                        # the matches have a space, then we will add an opening quote to the matches.
+                        if len(common_prefix) > len(text) and ' ' in all_matches_str:
 
                             # Figure out what kind of quote to add and save it as the unclosed_quote
                             if '"' in all_matches_str: