Simplify documentation generation.

1. The MathJax font configuration is moved into conf.py and removed
from make_docs.py along with better font sizing.
2. Remove the bread crumb replacement as it is not working anymore.
3. Fix a parsing error in nnls_modeling.rst which the new version of
sphinx barfed on.

Change-Id: Ia3c2e732323a8b5cabafe851ac5ca0f0c82da071

docs/source/conf.py

@@ -41,16 +41,16 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'Ceres Solver'
-copyright = u'2018 Google Inc'
+copyright = u'2020 Google Inc'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '1.14'
+version = '2.0'
 # The full version, including alpha/beta/rc tags.
-release = '1.14.0'
+release = '2.0.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -240,3 +240,15 @@ texinfo_documents = [
 
 # How to display URL addresses: 'footnote', 'no', or 'inline'.
 #texinfo_show_urls = 'footnote'
+
+# Custom configuration for MathJax.
+#
+# By default MathJax does not use TeX fonts, which is a tragedy. Also
+# scaling the fonts down a bit makes them fit better with font sizing
+# in the "Read The Docs" theme.
+mathjax_config = {
+'HTML-CSS' : {
+        'availableFonts' : ["TeX"],
+        'scale' : 90
+   }
+}

docs/source/nnls_modeling.rst

@@ -1560,7 +1560,7 @@ Instances
 
 .. class:: Problem::Options
 
-   Options struct that is used to control :class:`Problem::`.
+   Options struct that is used to control :class:`Problem`.
 
 .. member:: Ownership Problem::Options::cost_function_ownership