#7618: fix highlight of code blocks

Doc/library/optparse.rst

@@ -55,7 +55,9 @@ Additionally, users can run one of  ::
    <yourscript> -h
    <yourscript> --help
 
-and :mod:`optparse` will print out a brief summary of your script's options::
+and :mod:`optparse` will print out a brief summary of your script's options:
+
+.. code-block:: text
 
    usage: <yourscript> [options]
 
@@ -130,12 +132,16 @@ option argument
    an argument that follows an option, is closely associated with that option,
    and is consumed from the argument list when that option is. With
    :mod:`optparse`, option arguments may either be in a separate argument from
-   their option::
+   their option:
+
+   .. code-block:: text
 
       -f foo
       --file foo
 
-   or included in the same argument::
+   or included in the same argument:
+
+   .. code-block:: text
 
       -ffoo
       --file=foo
@@ -480,7 +486,9 @@ user-friendly (documented) options::
 
 If :mod:`optparse` encounters either ``"-h"`` or ``"--help"`` on the
 command-line, or if you just call :meth:`parser.print_help`, it prints the
-following to standard output::
+following to standard output:
+
+.. code-block:: text
 
    usage: <yourscript> [options] arg1 arg2
 
@@ -554,7 +562,9 @@ parser is easy::
     group.add_option("-g", action="store_true", help="Group option.")
     parser.add_option_group(group)
 
-This would result in the following help output::
+This would result in the following help output:
+
+.. code-block:: text
 
     usage:  [options] arg1 arg2
 
@@ -1131,7 +1141,9 @@ must specify for any option using that action.
 
   If :mod:`optparse` sees either ``"-h"`` or ``"--help"`` on the command line,
   it will print something like the following help message to stdout (assuming
-  ``sys.argv[0]`` is ``"foo.py"``)::
+  ``sys.argv[0]`` is ``"foo.py"``):
+
+  .. code-block:: text
 
      usage: foo.py [options]
 
@@ -1853,7 +1865,7 @@ would result in a list  ::
 
 Again we define a subclass of Option::
 
-   class MyOption (Option):
+   class MyOption(Option):
 
        ACTIONS = Option.ACTIONS + ("extend",)
        STORE_ACTIONS = Option.STORE_ACTIONS + ("extend",)