Fix sphinx warnings

doc/_exts/sphinxcontrib/rubydomain.py

@@ -13,6 +13,7 @@ import re
 
 from docutils import nodes
 from docutils.parsers.rst import directives
+from docutils.parsers.rst import Directive
 
 from sphinx import addnodes
 from sphinx import version_info
@@ -21,10 +22,8 @@ from sphinx.locale import l_, _
 from sphinx.domains import Domain, ObjType, Index
 from sphinx.directives import ObjectDescription
 from sphinx.util.nodes import make_refnode
-from sphinx.util.compat import Directive
 from sphinx.util.docfields import Field, GroupedField, TypedField
 
-
 # REs for Ruby signatures
 rb_sig_re = re.compile(
     r'''^ ([\w.]*\.)?            # class name(s)

doc/conf.py.in

@@ -157,7 +157,7 @@ html_theme_path = ['@top_srcdir@/doc/_themes']
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
-html_use_smartypants = False
+#html_use_smartypants = False
 
 # Custom sidebar templates, maps document names to template names.
 html_sidebars = {

doc/docutils.conf

@@ -0,0 +1,2 @@
+[parsers]
+smart_quotes=no