diff --git a/lib/compiler/passes/generate-javascript.js b/lib/compiler/passes/generate-javascript.js
index da54462..19c66b6 100644
--- a/lib/compiler/passes/generate-javascript.js
+++ b/lib/compiler/passes/generate-javascript.js
@@ -685,9 +685,9 @@ module.exports = function(ast, options) {
      * return, line separator, paragraph separator, and line feed. Any character
      * may appear in the form of an escape sequence.
      *
-     * For portability, we also escape escape all control and non-ASCII
-     * characters. Note that "\0" and "\v" escape sequences are not used because
-     * JSHint does not like the first and IE the second.
+     * For portability, we also escape all control and non-ASCII characters.
+     * Note that "\0" and "\v" escape sequences are not used because JSHint does
+     * not like the first and IE the second.
      */
     '        return s',
     '          .replace(/\\\\/g,   \'\\\\\\\\\')', // backslash
diff --git a/lib/utils.js b/lib/utils.js
index ed08fc0..8ca3ce1 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -162,9 +162,9 @@ var utils = {
      * return, line separator, paragraph separator, and line feed. Any character
      * may appear in the form of an escape sequence.
      *
-     * For portability, we also escape escape all control and non-ASCII
-     * characters. Note that "\0" and "\v" escape sequences are not used because
-     * JSHint does not like the first and IE the second.
+     * For portability, we also escape all control and non-ASCII characters.
+     * Note that "\0" and "\v" escape sequences are not used because JSHint does
+     * not like the first and IE the second.
      */
     return '"' + s
       .replace(/\\/g, '\\\\')  // backslash
@@ -186,8 +186,7 @@ var utils = {
     /*
      * Based on ECMA-262, 5th ed., 7.8.5 & 15.10.1.
      *
-     * For portability, we also escape escape all control and non-ASCII
-     * characters.
+     * For portability, we also escape all control and non-ASCII characters.
      */
     return s
       .replace(/\\/g, '\\\\')  // backslash