diff --git a/docs/make.bat b/docs/make.bat
--- a/docs/make.bat
+++ b/docs/make.bat
@@ -3,153 +3,153 @@
 REM Command file for Sphinx documentation
 
 if "%SPHINXBUILD%" == "" (
-	set SPHINXBUILD=sphinx-build
+    set SPHINXBUILD=sphinx-build
 )
 set BUILDDIR=_build
 set ALLSPHINXOPTS=-d %BUILDDIR%/doctrees %SPHINXOPTS% .
 if NOT "%PAPER%" == "" (
-	set ALLSPHINXOPTS=-D latex_paper_size=%PAPER% %ALLSPHINXOPTS%
+    set ALLSPHINXOPTS=-D latex_paper_size=%PAPER% %ALLSPHINXOPTS%
 )
 
 if "%1" == "" goto help
 
 if "%1" == "help" (
-	:help
-	echo.Please use `make ^<target^>` where ^<target^> is one of
-	echo.  html       to make standalone HTML files
-	echo.  dirhtml    to make HTML files named index.html in directories
-	echo.  singlehtml to make a single large HTML file
-	echo.  pickle     to make pickle files
-	echo.  json       to make JSON files
-	echo.  htmlhelp   to make HTML files and a HTML help project
-	echo.  qthelp     to make HTML files and a qthelp project
-	echo.  devhelp    to make HTML files and a Devhelp project
-	echo.  epub       to make an epub
-	echo.  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter
-	echo.  text       to make text files
-	echo.  man        to make manual pages
-	echo.  changes    to make an overview over all changed/added/deprecated items
-	echo.  linkcheck  to check all external links for integrity
-	echo.  doctest    to run all doctests embedded in the documentation if enabled
-	goto end
+    :help
+    echo.Please use `make ^<target^>` where ^<target^> is one of
+    echo.  html       to make standalone HTML files
+    echo.  dirhtml    to make HTML files named index.html in directories
+    echo.  singlehtml to make a single large HTML file
+    echo.  pickle     to make pickle files
+    echo.  json       to make JSON files
+    echo.  htmlhelp   to make HTML files and a HTML help project
+    echo.  qthelp     to make HTML files and a qthelp project
+    echo.  devhelp    to make HTML files and a Devhelp project
+    echo.  epub       to make an epub
+    echo.  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter
+    echo.  text       to make text files
+    echo.  man        to make manual pages
+    echo.  changes    to make an overview over all changed/added/deprecated items
+    echo.  linkcheck  to check all external links for integrity
+    echo.  doctest    to run all doctests embedded in the documentation if enabled
+    goto end
 )
 
 if "%1" == "clean" (
-	for /d %%i in (%BUILDDIR%\*) do rmdir /q /s %%i
-	del /q /s %BUILDDIR%\*
-	goto end
+    for /d %%i in (%BUILDDIR%\*) do rmdir /q /s %%i
+    del /q /s %BUILDDIR%\*
+    goto end
 )
 
 if "%1" == "html" (
-	%SPHINXBUILD% -b html %ALLSPHINXOPTS% %BUILDDIR%/html
-	echo.
-	echo.Build finished. The HTML pages are in %BUILDDIR%/html.
-	goto end
+    %SPHINXBUILD% -b html %ALLSPHINXOPTS% %BUILDDIR%/html
+    echo.
+    echo.Build finished. The HTML pages are in %BUILDDIR%/html.
+    goto end
 )
 
 if "%1" == "dirhtml" (
-	%SPHINXBUILD% -b dirhtml %ALLSPHINXOPTS% %BUILDDIR%/dirhtml
-	echo.
-	echo.Build finished. The HTML pages are in %BUILDDIR%/dirhtml.
-	goto end
+    %SPHINXBUILD% -b dirhtml %ALLSPHINXOPTS% %BUILDDIR%/dirhtml
+    echo.
+    echo.Build finished. The HTML pages are in %BUILDDIR%/dirhtml.
+    goto end
 )
 
 if "%1" == "singlehtml" (
-	%SPHINXBUILD% -b singlehtml %ALLSPHINXOPTS% %BUILDDIR%/singlehtml
-	echo.
-	echo.Build finished. The HTML pages are in %BUILDDIR%/singlehtml.
-	goto end
+    %SPHINXBUILD% -b singlehtml %ALLSPHINXOPTS% %BUILDDIR%/singlehtml
+    echo.
+    echo.Build finished. The HTML pages are in %BUILDDIR%/singlehtml.
+    goto end
 )
 
 if "%1" == "pickle" (
-	%SPHINXBUILD% -b pickle %ALLSPHINXOPTS% %BUILDDIR%/pickle
-	echo.
-	echo.Build finished; now you can process the pickle files.
-	goto end
+    %SPHINXBUILD% -b pickle %ALLSPHINXOPTS% %BUILDDIR%/pickle
+    echo.
+    echo.Build finished; now you can process the pickle files.
+    goto end
 )
 
 if "%1" == "json" (
-	%SPHINXBUILD% -b json %ALLSPHINXOPTS% %BUILDDIR%/json
-	echo.
-	echo.Build finished; now you can process the JSON files.
-	goto end
+    %SPHINXBUILD% -b json %ALLSPHINXOPTS% %BUILDDIR%/json
+    echo.
+    echo.Build finished; now you can process the JSON files.
+    goto end
 )
 
 if "%1" == "htmlhelp" (
-	%SPHINXBUILD% -b htmlhelp %ALLSPHINXOPTS% %BUILDDIR%/htmlhelp
-	echo.
-	echo.Build finished; now you can run HTML Help Workshop with the ^
+    %SPHINXBUILD% -b htmlhelp %ALLSPHINXOPTS% %BUILDDIR%/htmlhelp
+    echo.
+    echo.Build finished; now you can run HTML Help Workshop with the ^
 .hhp project file in %BUILDDIR%/htmlhelp.
-	goto end
+    goto end
 )
 
 if "%1" == "qthelp" (
-	%SPHINXBUILD% -b qthelp %ALLSPHINXOPTS% %BUILDDIR%/qthelp
-	echo.
-	echo.Build finished; now you can run "qcollectiongenerator" with the ^
+    %SPHINXBUILD% -b qthelp %ALLSPHINXOPTS% %BUILDDIR%/qthelp
+    echo.
+    echo.Build finished; now you can run "qcollectiongenerator" with the ^
 .qhcp project file in %BUILDDIR%/qthelp, like this:
-	echo.^> qcollectiongenerator %BUILDDIR%\qthelp\Kallithea.qhcp
-	echo.To view the help file:
-	echo.^> assistant -collectionFile %BUILDDIR%\qthelp\Kallithea.ghc
-	goto end
+    echo.^> qcollectiongenerator %BUILDDIR%\qthelp\Kallithea.qhcp
+    echo.To view the help file:
+    echo.^> assistant -collectionFile %BUILDDIR%\qthelp\Kallithea.ghc
+    goto end
 )
 
 if "%1" == "devhelp" (
-	%SPHINXBUILD% -b devhelp %ALLSPHINXOPTS% %BUILDDIR%/devhelp
-	echo.
-	echo.Build finished.
-	goto end
+    %SPHINXBUILD% -b devhelp %ALLSPHINXOPTS% %BUILDDIR%/devhelp
+    echo.
+    echo.Build finished.
+    goto end
 )
 
 if "%1" == "epub" (
-	%SPHINXBUILD% -b epub %ALLSPHINXOPTS% %BUILDDIR%/epub
-	echo.
-	echo.Build finished. The epub file is in %BUILDDIR%/epub.
-	goto end
+    %SPHINXBUILD% -b epub %ALLSPHINXOPTS% %BUILDDIR%/epub
+    echo.
+    echo.Build finished. The epub file is in %BUILDDIR%/epub.
+    goto end
 )
 
 if "%1" == "latex" (
-	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
-	echo.
-	echo.Build finished; the LaTeX files are in %BUILDDIR%/latex.
-	goto end
+    %SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
+    echo.
+    echo.Build finished; the LaTeX files are in %BUILDDIR%/latex.
+    goto end
 )
 
 if "%1" == "text" (
-	%SPHINXBUILD% -b text %ALLSPHINXOPTS% %BUILDDIR%/text
-	echo.
-	echo.Build finished. The text files are in %BUILDDIR%/text.
-	goto end
+    %SPHINXBUILD% -b text %ALLSPHINXOPTS% %BUILDDIR%/text
+    echo.
+    echo.Build finished. The text files are in %BUILDDIR%/text.
+    goto end
 )
 
 if "%1" == "man" (
-	%SPHINXBUILD% -b man %ALLSPHINXOPTS% %BUILDDIR%/man
-	echo.
-	echo.Build finished. The manual pages are in %BUILDDIR%/man.
-	goto end
+    %SPHINXBUILD% -b man %ALLSPHINXOPTS% %BUILDDIR%/man
+    echo.
+    echo.Build finished. The manual pages are in %BUILDDIR%/man.
+    goto end
 )
 
 if "%1" == "changes" (
-	%SPHINXBUILD% -b changes %ALLSPHINXOPTS% %BUILDDIR%/changes
-	echo.
-	echo.The overview file is in %BUILDDIR%/changes.
-	goto end
+    %SPHINXBUILD% -b changes %ALLSPHINXOPTS% %BUILDDIR%/changes
+    echo.
+    echo.The overview file is in %BUILDDIR%/changes.
+    goto end
 )
 
 if "%1" == "linkcheck" (
-	%SPHINXBUILD% -b linkcheck %ALLSPHINXOPTS% %BUILDDIR%/linkcheck
-	echo.
-	echo.Link check complete; look for any errors in the above output ^
+    %SPHINXBUILD% -b linkcheck %ALLSPHINXOPTS% %BUILDDIR%/linkcheck
+    echo.
+    echo.Link check complete; look for any errors in the above output ^
 or in %BUILDDIR%/linkcheck/output.txt.
-	goto end
+    goto end
 )
 
 if "%1" == "doctest" (
-	%SPHINXBUILD% -b doctest %ALLSPHINXOPTS% %BUILDDIR%/doctest
-	echo.
-	echo.Testing of doctests in the sources finished, look at the ^
+    %SPHINXBUILD% -b doctest %ALLSPHINXOPTS% %BUILDDIR%/doctest
+    echo.
+    echo.Testing of doctests in the sources finished, look at the ^
 results in %BUILDDIR%/doctest/output.txt.
-	goto end
+    goto end
 )
 
 :end