diff --git a/extensions/chromium/pdfHandler.js b/extensions/chromium/pdfHandler.js
index 6e0b99817..07b8457f0 100644
--- a/extensions/chromium/pdfHandler.js
+++ b/extensions/chromium/pdfHandler.js
@@ -54,7 +54,7 @@ function isPdfDownloadable(details) {
  * @return {undefined|{name: string, value: string}} The header, if found.
  */
 function getHeaderFromHeaders(headers, headerName) {
-  for (var i=0; i<headers.length; ++i) {
+  for (var i = 0; i < headers.length; ++i) {
     var header = headers[i];
     if (header.name.toLowerCase() === headerName) {
       return header;
diff --git a/external/builder/preprocessor2.js b/external/builder/preprocessor2.js
index c1c7d84e0..9967e1a51 100644
--- a/external/builder/preprocessor2.js
+++ b/external/builder/preprocessor2.js
@@ -68,7 +68,7 @@ function handlePreprocessorAction(ctx, actionName, args, loc) {
                                jsonPath.substring(ROOT_PREFIX.length));
         }
         var jsonContent = fs.readFileSync(jsonPath).toString();
-        var parsedJSON = esprima.parse('(' +jsonContent + ')');
+        var parsedJSON = esprima.parse('(' + jsonContent + ')');
         parsedJSON.body[0].expression.loc = loc;
         return parsedJSON.body[0].expression;
     }
diff --git a/src/core/parser.js b/src/core/parser.js
index f063f66d4..378d30855 100644
--- a/src/core/parser.js
+++ b/src/core/parser.js
@@ -895,7 +895,7 @@ var Lexer = (function LexerClosure() {
             var x2 = toHexDigit(ch);
             if (x2 === -1) {
               warn('Lexer_getName: Illegal digit (' +
-                   String.fromCharCode(ch) +') in hexadecimal number.');
+                   String.fromCharCode(ch) + ') in hexadecimal number.');
               strBuf.push('#', String.fromCharCode(previousCh));
               if (specialChars[ch]) {
                 break;
diff --git a/src/shared/util.js b/src/shared/util.js
index 3c5ac5f1f..4e3e50197 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -1925,7 +1925,7 @@ if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('MOZCENTRAL')) {
           break;
 
         case 'relative or authority':
-          if ('/' === c && '/' === input[cursor+1]) {
+          if ('/' === c && '/' === input[cursor + 1]) {
             state = 'authority ignore slashes';
           } else {
             err('Expected /, got: ' + c);
@@ -1970,8 +1970,8 @@ if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('MOZCENTRAL')) {
             this._password = base._password;
             state = 'fragment';
           } else {
-            var nextC = input[cursor+1];
-            var nextNextC = input[cursor+2];
+            var nextC = input[cursor + 1];
+            var nextNextC = input[cursor + 2];
             if ('file' !== this._scheme || !ALPHA.test(c) ||
                 (nextC !== ':' && nextC !== '|') ||
                 (EOF !== nextNextC && '/' !== nextNextC && '\\' !== nextNextC &&
diff --git a/test/stats/statcmp.js b/test/stats/statcmp.js
index 580c17306..0b15dc5ab 100644
--- a/test/stats/statcmp.js
+++ b/test/stats/statcmp.js
@@ -159,7 +159,7 @@ function stat(baseline, current) {
   }
 
   // add horizontal line
-  var hline = width.map(function(w) { return new Array(w+1).join('-'); });
+  var hline = width.map(function(w) { return new Array(w + 1).join('-'); });
   rows.splice(1, 0, hline);
 
   // print output
diff --git a/test/unit/type1_parser_spec.js b/test/unit/type1_parser_spec.js
index 838dc4b94..cc8825e82 100644
--- a/test/unit/type1_parser_spec.js
+++ b/test/unit/type1_parser_spec.js
@@ -70,7 +70,7 @@ describe('Type1Parser', function() {
     var stream = new StringStream(
       '/ExpansionFactor  99\n' +
       '/Subrs 1 array\n' +
-      'dup 0 1 RD x noaccess put\n'+
+      'dup 0 1 RD x noaccess put\n' +
       'end\n' +
       '/CharStrings 46 dict dup begin\n' +
       '/.notdef 1 RD x ND\n' +