[IMP] odoo_theme: add the class o_code on literals

The SCSS that styles the `literal`, `code`, `file`, and `command` roles
is excessively complex because the traduction from RST to HTML is not
consistent from one role to another: some use `<code>` elements, some
have the `code` class, some wrap the literal with a `span` element.

This commit sets the `o_code` class on all of these roles' parent node
at translation time to allow simplifying the SCSS target.

extensions/odoo_theme/translator.py

@@ -137,6 +137,17 @@ class BootstrapTranslator(HTML5Translator):
         else:
             super().depart_title(node)
 
+    def visit_literal(self, node):
+        """ Override to add the class `o_code` to all `literal`, `code`, and `file` roles. """
+        node['classes'].append('o_code')
+        return super().visit_literal(node)
+
+    def visit_literal_strong(self, node):
+        """ Override to add the class `o_code` to all `command` roles. """
+        if 'command' in node['classes']:
+            node['classes'].append('o_code')
+        return super().visit_literal_strong(node)
+
     # overwritten
     # Ensure table class is present for tables
     def visit_table(self, node):