Manually set readline delimiters to not include a dash ("-")

This is because file paths which had a "-" in them were not being completed with tab completion of local paths.

Author: Todd Leonhardt

cmd2.py

@@ -1090,7 +1090,10 @@ def _cmdloop(self):
         if self.use_rawinput and self.completekey:
             try:
                 self.old_completer = readline.get_completer()
+                self.old_delims = readline.get_completer_delims()
                 readline.set_completer(self.complete)
+                # Don't treat "-" as a readline delimiter since it is commonly used in filesystem paths
+                readline.set_completer_delims(self.old_delims.replace('-', ''))
                 readline.parse_and_bind(self.completekey + ": complete")
             except NameError:
                 pass
@@ -1109,6 +1112,7 @@ def _cmdloop(self):
             if self.use_rawinput and self.completekey:
                 try:
                     readline.set_completer(self.old_completer)
+                    readline.set_completer_delims(self.old_delims)
                 except NameError:
                     pass
             return stop