RTD fixes

Author: spookylukey

ARCHITECTURE.rst

@@ -61,7 +61,7 @@ Note a few things:
 
 We do not, in fact, generate Python code as a string, but instead generate AST
 which we can convert to executable Python functions using the builtin functions
-`compile <https://docs.python.org/3/library/functions.html#compile>`_ and `exec
+`compile <https://docs.python.org/3/library/functions.html#compile>`__ and `exec
 <https://docs.python.org/3/library/functions.html#exec>`_.
 
 Layers
@@ -86,7 +86,7 @@ module to construct correct code without worrying about lower level details.
 
 The classes in the ``codegen`` module eventually need to produce AST objects
 that can be passed to Python’s builtin `compile
-<https://docs.python.org/3/library/functions.html?highlight=compile#compile>`_
+<https://docs.python.org/3/library/functions.html?highlight=compile#compile>`__
 function. The stdlib `ast <https://docs.python.org/3/library/ast.html>`_ module
 has incompatible differences between different Python versions, so we abstract
 over these in ``fluent_compiler.ast_compat`` which allows the ``codegen`` module

docs/conf.py

@@ -41,6 +41,7 @@
 extensions = [
     "sphinx.ext.intersphinx",
     "sphinx.ext.viewcode",
+    "sphinx_rtd_theme",
 ]
 
 # Add any paths that contain templates here, relative to this directory.
@@ -60,7 +61,7 @@
 #
 # 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"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
@@ -76,7 +77,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = "default"
+html_theme = "sphinx_rtd_theme"
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the