minor #7590 Fix build documentation for Windows environments (yceruto)

This PR was merged into the 2.7 branch.

Discussion
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Fix build documentation for Windows environments

Fix #7548 Now there should be no differences between environments when we build the documentation locally.

Commits
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05412be Fix doc build in Windows environments

Author: xabbuh

_build/make.bat

@@ -5,8 +5,8 @@ REM Command file for Sphinx documentation
 if "%SPHINXBUILD%" == "" (
 	set SPHINXBUILD=sphinx-build
 )
-set BUILDDIR=_build
-set ALLSPHINXOPTS=-d %BUILDDIR%/doctrees %SPHINXOPTS% .
+set BUILDDIR=.
+set ALLSPHINXOPTS=-c %BUILDDIR% -d %BUILDDIR%/doctrees %SPHINXOPTS% ..
 set I18NSPHINXOPTS=%SPHINXOPTS% .
 if NOT "%PAPER%" == "" (
 	set ALLSPHINXOPTS=-D latex_paper_size=%PAPER% %ALLSPHINXOPTS%

contributing/documentation/overview.rst

@@ -279,13 +279,9 @@ purposes following these steps:
 
    .. code-block:: terminal
 
-       # Linux and macOS
        $ cd _build/
        $ make html
 
-       # Windows
-       $ _build\make html
-
 The generated documentation is available in the ``_build/html`` directory.
 
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