Literal/ref format is different when occuring in definition list

Fixes #717

Author: Blendify

src/sass/_theme_rst.sass

@@ -430,7 +430,6 @@
       margin-top: 0
     // Since dts get the callout style, we treat this less as callouts.
     tt, code
-      font-weight: bold
       &.descname, &.descclassname
         background-color: transparent
         border: none