diff --git a/src/node/markdown/plugins/highlightLines.ts b/src/node/markdown/plugins/highlightLines.ts
index 5938f8b5..f7e5293a 100644
--- a/src/node/markdown/plugins/highlightLines.ts
+++ b/src/node/markdown/plugins/highlightLines.ts
@@ -10,20 +10,23 @@ export const highlightLinePlugin = (md: MarkdownIt) => {
     const [tokens, idx, options] = args
     const token = tokens[idx]
 
-    // due to use of markdown-it-attrs, the {0} syntax would have been converted
-    // to attrs on the token
+    // due to use of markdown-it-attrs, the {0} syntax would have been
+    // converted to attrs on the token
     const attr = token.attrs && token.attrs[0]
+
     let lines = null
+
     if (!attr) {
       // markdown-it-attrs maybe disabled
-
       const rawInfo = token.info
+
       if (!rawInfo || !RE.test(rawInfo)) {
         return fence(...args)
       }
 
       const langName = rawInfo.replace(RE, '').trim()
-      // ensure the next plugin get the correct lang.
+
+      // ensure the next plugin get the correct lang
       token.info = langName
 
       lines = RE.exec(rawInfo)![1]
@@ -31,6 +34,7 @@ export const highlightLinePlugin = (md: MarkdownIt) => {
 
     if (!lines) {
       lines = attr![0]
+
       if (!lines || !/[\d,-]+/.test(lines)) {
         return fence(...args)
       }
@@ -45,6 +49,7 @@ export const highlightLinePlugin = (md: MarkdownIt) => {
       : token.content
 
     const rawCode = code.replace(wrapperRE, '')
+
     const highlightLinesCode = rawCode
       .split('\n')
       .map((split, index) => {