[Doc] Minor doc fix for codeop

Doc/library/codeop.rst

@@ -19,10 +19,10 @@ module instead.
 
 There are two parts to this job:
 
-#. Being able to tell if a line of input completes a Python  statement: in
+#. Being able to tell if a line of input completes a Python statement: in
    short, telling whether to print '``>>>``' or '``...``' next.
 
-#. Remembering which future statements the user has entered, so  subsequent
+#. Remembering which future statements the user has entered, so subsequent
    input can be compiled with these in effect.
 
 The :mod:`codeop` module provides a way of doing each of these things, and a way
@@ -33,19 +33,19 @@ To do just the former:
 .. function:: compile_command(source, filename="<input>", symbol="single")
 
    Tries to compile *source*, which should be a string of Python code and return a
-   code object if *source* is valid Python code. In that case, the filename
+   code object if *source* is valid Python code.  In that case, the filename
    attribute of the code object will be *filename*, which defaults to
-   ``'<input>'``. Returns ``None`` if *source* is *not* valid Python code, but is a
+   ``'<input>'``.  Returns ``None`` if *source* is *not* valid Python code, but is a
    prefix of valid Python code.
 
    If there is a problem with *source*, an exception will be raised.
    :exc:`SyntaxError` is raised if there is invalid Python syntax, and
    :exc:`OverflowError` or :exc:`ValueError` if there is an invalid literal.
 
    The *symbol* argument determines whether *source* is compiled as a statement
-   (``'single'``, the default), as a sequence of statements (``'exec'``) or
+   (``'single'``, the default), as a sequence of :term:`statement` (``'exec'``) or
    as an :term:`expression` (``'eval'``).  Any other value will
-   cause :exc:`ValueError` to  be raised.
+   cause :exc:`ValueError` to be raised.
 
    .. note::
 
@@ -69,5 +69,5 @@ To do just the former:
 
    Instances of this class have :meth:`__call__` methods identical in signature to
    :func:`compile_command`; the difference is that if the instance compiles program
-   text containing a ``__future__`` statement, the instance 'remembers' and
+   text containing a :mod:`__future__` statement, the instance 'remembers' and
    compiles all subsequent program texts with the statement in force.