Line Highlight: Extend highlight to full line width inside scroll container (#3011)

Author: kuceb

plugins/line-highlight/prism-line-highlight.js

@@ -195,6 +195,10 @@
 				});
 			}
 
+			mutateActions.push(function () {
+				line.style.width = pre.scrollWidth + 'px';
+			});
+
 			mutateActions.push(function () {
 				// allow this to play nicely with the line-numbers plugin
 				// need to attack to pre as when line-numbers is enabled, the code tag is relatively which screws up the positioning