Issue #26462: Doc: reduce literal_block warnings, fix syntax highlighting.

Patch by Julien Palard.

Doc/distutils/examples.rst

@@ -245,7 +245,9 @@ Let's take an example with a simple script::
 
     setup(name='foobar')
 
-Running the ``check`` command will display some warnings::
+Running the ``check`` command will display some warnings:
+
+.. code-block:: shell-session
 
     $ python setup.py check
     running check
@@ -274,7 +276,9 @@ For example, if the :file:`setup.py` script is changed like this::
         url='http://example.com', long_description=desc)
 
 Where the long description is broken, ``check`` will be able to detect it
-by using the :mod:`docutils` parser::
+by using the :mod:`docutils` parser:
+
+.. code-block:: shell-session
 
     $ python setup.py check --restructuredtext
     running check
@@ -286,7 +290,9 @@ Reading the metadata
 
 The :func:`distutils.core.setup` function provides a command-line interface
 that allows you to query the metadata fields of a project through the
-``setup.py`` script of a given project::
+``setup.py`` script of a given project:
+
+.. code-block:: shell-session
 
     $ python setup.py --name
     distribute

Doc/distutils/packageindex.rst

@@ -233,7 +233,9 @@ in the root of the package besides :file:`setup.py`.
 
 To prevent registering broken reStructuredText content, you can use the
 :program:`rst2html` program that is provided by the :mod:`docutils` package and
-check the ``long_description`` from the command line::
+check the ``long_description`` from the command line:
+
+.. code-block:: shell-session
 
     $ python setup.py --long-description | rst2html.py > output.html
 

Doc/distutils/sourcedist.rst

@@ -133,7 +133,9 @@ described above does not apply in this case.
 
 The manifest template has one command per line, where each command specifies a
 set of files to include or exclude from the source distribution.  For an
-example, again we turn to the Distutils' own manifest template::
+example, again we turn to the Distutils' own manifest template:
+
+.. code-block:: none
 
    include *.txt
    recursive-include examples *.txt *.py