Removed duplicate word and capitalized two comment sentences

Author: kmvanbrunt

cmd2/ansi.py

@@ -32,7 +32,7 @@
 always be output.
 """
 
-# Controls when ANSI style style sequences are allowed in output
+# Controls when ANSI style sequences are allowed in output
 allow_style = STYLE_TERMINAL
 """When using outside of a cmd2 app, set this variable to one of:
 

cmd2/argparse_custom.py

@@ -92,7 +92,7 @@ def my_completer_function(text, line, begidx, endidx):
 
     Example::
 
-        # this adds file-path completion to an argument
+        # This adds file-path completion to an argument
         parser.add_argument('-o', '--options', completer_method=cmd2.Cmd.path_complete)
 
 
@@ -101,7 +101,7 @@ def my_completer_function(text, line, begidx, endidx):
 
     Example::
 
-        # this says to call path_complete with a preset value for its path_filter argument.
+        # This says to call path_complete with a preset value for its path_filter argument
         completer_method = functools.partial(path_complete,
                                              path_filter=lambda path: os.path.isdir(path))
         parser.add_argument('-o', '--options', choices_method=completer_method)