Restore highlighted code lines span full width

Author: Blendify

sphinx_rtd_theme/static/css/theme.css

@@ -85,6 +85,11 @@
     padding: ($base-line-height / 2) ($base-line-height / 2)
     display: block
     overflow: auto
+    & .hll
+      // Line emphasis spans full width
+      display: block
+      margin: 0 (-1 * $base-line-height / 2)
+      padding: 0 ($base-line-height / 2)
   pre.literal-block, div[class^='highlight'] pre, .linenodiv pre
     font-family: $code-font-family
     font-size: 12px