diff --git a/tools/cleanup.js b/tools/cleanup.js
index aa3e5f86..7532942a 100644
--- a/tools/cleanup.js
+++ b/tools/cleanup.js
@@ -1,5 +1,5 @@
 module.exports = function cleanUp(latex) {
-  // strip any \[ and \], which is an block-level LaTeX markup indicator for MathJax:
+  // strip any \[ and \], which is a block-level LaTeX markup indicator for MathJax:
   latex = latex.replace(/^'/,'').replace(/'$/,'').replace('\\[','').replace('\\]','');
 
   // wrap some known functor words in italics markup