Merge pull request #3 from tyhopp/master

Fix line highlighting issues

Author: weirdpattern

src/index.js

@@ -129,7 +129,7 @@ export default async ({ markdownAST }, options = {}) => {
     let html = content.div;
     if (query.highlights.length > 0) {
       const $ = cheerio.load(content.div);
-      const file = query.file.replace(/[^a-zA-Z0-9_]+/, "-");
+      const file = query.file.replace(/[^a-zA-Z0-9_]+/g, "-").toLowerCase();
       query.highlights.forEach(line => {
         $(`#file-${file}-LC${line}`).addClass("highlighted");
       });