Merge pull request sphinx-doc#9763 from QuLogic/fix-parameter-breaks

Fix selection of parameter names in HTML theme

Author: tk0miya

sphinx/themes/basic/static/basic.css_t

@@ -731,8 +731,9 @@ dl.glossary dt {
 
 .classifier:before {
     font-style: normal;
-    margin: 0.5em;
+    margin: 0 0.5em;
     content: ":";
+    display: inline-block;
 }
 
 abbr, acronym {