A few very minor grammar fixes

Author: tleonhardt

docs/features/argument_processing.md

@@ -227,8 +227,8 @@ class CmdLineApp(cmd2.Cmd):
 
 ## Unknown Positional Arguments
 
-To pass all unknown arguments to be passed to your command as a list of strings, then decorate the
-command method with the `@with_argparser(..., with_unknown_args=True)` decorator.
+To pass all unknown arguments to your command as a list of strings, then decorate the command method
+with the `@with_argparser(..., with_unknown_args=True)` decorator.
 
 Here's what it looks like:
 

docs/features/commands.md

@@ -73,34 +73,34 @@ already parsed.
 
 A `Statement` object is a subclass of `str` that contains the following attributes:
 
-command
+**command**
 
 : Name of the command called. You already know this because of the method `cmd2` called, but it can
 sometimes be nice to have it in a string, i.e. if you want your error messages to contain the
 command name.
 
-args
+**args**
 
 : A string containing the arguments to the command with output redirection or piping to shell
 commands removed. It turns out that the "string" value of the `Statement` object has all the output
 redirection and piping clauses removed as well. Quotes remain in the string.
 
-command_and_args
+**command_and_args**
 
 : A string of just the command and the arguments, with output redirection or piping to shell
 commands removed.
 
-argv
+**argv**
 
 : A list of arguments a-la `sys.argv`, including the command as `argv[0]` and the subsequent
 arguments as additional items in the list. Quotes around arguments will be stripped as will any
 output redirection or piping portions of the command.
 
-raw
+**raw**
 
 : Full input exactly as typed by the user.
 
-terminator
+**terminator**
 
 : Character used to end a multiline command. You can configure multiple termination characters, and
 this attribute will tell you which one the user typed.

docs/features/completion.md

@@ -84,7 +84,7 @@ an error occurs in which it is more desirable to display a message than a stack
 has a member called `apply_style`. Set this False if the error style should not be applied. For
 instance, `ArgparseCompleter` sets it to False when displaying completion hints.
 
-## Tab Completion Using argparse Decorator {: #argparse-based }
+## Tab Completion Using the argparse Decorator {: #argparse-based }
 
 When using `cmd2`'s [@with_argparser][cmd2.with_argparser] decorator, `cmd2` provides automatic tab
 completion of flag names.