Update the Sphinx dependencies (#10448)

inlinesyntaxhighlight was not updated for 10 years and removed.

Author: sjoelund

doc/UsersGuide/source/conf.py

@@ -46,7 +46,6 @@
     'sphinx.ext.ifconfig',
     'sphinx.ext.imgmath',
     'sphinxcontrib.bibtex',
-    'sphinxcontrib.inlinesyntaxhighlight',
     'sphinxcontrib.programoutput',
     'sphinxcontribopenmodelica'
 ]
@@ -129,7 +128,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = 'en'
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:
@@ -445,3 +444,5 @@
 
 highlight_language = 'modelica'
 imgmath_image_format = 'svg'
+
+bibtex_bibfiles = ['openmodelica.bib', 'extrarefs.bib']

doc/UsersGuide/source/introduction.rst

@@ -3,7 +3,7 @@ Introduction
 
 .. highlight:: modelica
 
-The |omlogo| system described in this document has both short-term
+The OpenModelica system described in this document has both short-term
 and long-term goals:
 
 -  The short-term goal is to develop an efficient interactive
@@ -988,8 +988,3 @@ the compiler:
 
 .. command-output :: omc --showErrorMessages -d=failtrace TestScript.mos
   :ellipsis: 4,-4
-
-.. |omlogo| image:: logo.*
-  :alt: OpenModelica logotype
-  :height: 14pt
-  :target: https://openmodelica.org

doc/UsersGuide/source/requirements.txt

@@ -1,8 +1,8 @@
 bibtexparser
 gitpython
 natsort
+breathe
 sphinx
-sphinxcontrib-bibtex<2.0.0
-sphinxcontrib-inlinesyntaxhighlight
+sphinxcontrib-bibtex
 sphinxcontrib-programoutput
 ompython