Use proper Pygments lexers

Author: AA-Turner

README.rst

@@ -48,7 +48,7 @@ Installation
 The following command installs Sphinx from the `Python Package Index`_. You will
 need a working installation of Python and pip.
 
-.. code-block:: sh
+.. code-block:: shell
 
    pip install -U sphinx
 

doc/faq.rst

@@ -236,7 +236,7 @@ The following list gives some hints for the creation of epub files:
   for Kindle. You can get ``yourdoc.mobi`` under ``_build/epub`` after the
   following command:
 
-  .. code-block:: bash
+  .. code-block:: console
 
      $ make epub
      $ kindlegen _build/epub/yourdoc.epub

doc/usage/advanced/intl.rst

@@ -176,17 +176,17 @@ section describe an easy way to translate with *sphinx-intl*.
 
    For Windows :command:`cmd.exe`, run:
 
-   .. code-block:: console
+   .. code-block:: doscon
 
       > set SPHINXOPTS=-D language=de
       > .\make.bat html
 
    For PowerShell, run:
 
-   .. code-block:: console
+   .. code-block:: ps1con
 
-      > Set-Item env:SPHINXOPTS "-D language=de"
-      > .\make.bat html
+      PS> Set-Item env:SPHINXOPTS "-D language=de"
+      PS> .\make.bat html
 
 Congratulations! You got the translated documentation in the ``_build/html``
 directory.