Stop using util.format.

This will massively shrink the browserified footprint.

lib/po.js

@@ -1,5 +1,5 @@
 var fs = require('fs'),
-    util = require('util');
+    isArray = require('lodash.isarray');
 
 function trim(string) {
     return string.replace(/^\s+|\s+$/g, '');
@@ -30,7 +30,7 @@ PO.prototype.toString = function () {
 
     var keys = Object.keys(this.headers);
     keys.forEach(function (key) {
-        lines.push(util.format('"%s: %s\\n"', key, that.headers[key]));
+        lines.push('"' + key + ': ' + that.headers[key] + '\\n"');
     });
 
     lines.push('');
@@ -174,40 +174,40 @@ PO.Item.prototype.toString = function () {
     var _process = function (keyword, text, i) {
         var lines = [],
             parts = text.split(/\n/),
-            index = typeof i !== 'undefined' ? util.format('[%d]', i) : '';
+            index = typeof i !== 'undefined' ? '[' + i + ']' : '';
         if (parts.length > 1) {
-            lines.push(util.format('%s%s ""', keyword, index));
+            lines.push(keyword + index + ' ""');
             parts.forEach(function (part) {
-                lines.push(util.format('"%s"', part));
+                lines.push('"' + part + '"');
             });
         }
         else {
-            lines.push(util.format('%s%s "%s"', keyword, index, text));
+            lines.push(keyword + index + ' "' + text + '"');
         }
         return lines;
     };
 
     if (this.references.length > 0) {
         this.references.forEach(function (ref) {
-            lines.push(util.format('#: %s', ref));
+            lines.push('#: ' + ref);
         });
     }
 
     var flags = Object.keys(this.flags);
     if (flags.length > 0) {
-        lines.push(util.format('#, %s', flags.join(",")));
+        lines.push('#, ' + flags.join(","));
     }
 
     ['msgid', 'msgid_plural', 'msgstr'].forEach(function (keyword) {
         var text = that[keyword];
         if (text != null) {
-            if (util.isArray(text) && text.length > 1) {
+            if (isArray(text) && text.length > 1) {
                 text.forEach(function (t, i) {
                     lines = lines.concat(_process(keyword, t, i));
                 });
             }
             else {
-                text = util.isArray(text) ? text.join() : text;
+                text = isArray(text) ? text.join() : text;
                 lines = lines.concat(_process(keyword, text));
             }
         }

package.json

@@ -24,5 +24,8 @@
     "grunt-contrib-watch": "~0.5.3",
     "grunt-contrib-jshint": "~0.7.2",
     "grunt-mocha-cli": "~1.4.0"
+  },
+  "dependencies": {
+    "lodash.isarray": "~2.4.1"
   }
 }

test/write.js

@@ -23,4 +23,18 @@ describe('Write', function () {
         var str = po.toString();
         assertHasLine(str, "#, fuzzy");
     });
+
+    it('write msgid', function () {
+        var input = fs.readFileSync(__dirname + '/fixtures/fuzzy.po', 'utf8');
+        var po = PO.parse(input);
+        var str = po.toString();
+        assertHasLine(str, "msgid \"Sources\"");
+    });
+
+    it('write msgstr', function () {
+        var input = fs.readFileSync(__dirname + '/fixtures/fuzzy.po', 'utf8');
+        var po = PO.parse(input);
+        var str = po.toString();
+        assertHasLine(str, "msgstr \"Source\"");
+    });
 });