Support multiple spaces after msgid

dist/pofile.js

@@ -83,7 +83,7 @@ PO.parse = function (data) {
     var headers = [];
     //everything until the first 'msgid ""' is considered header
     while (sections[0] && (headers.length === 0 || headers[headers.length - 1].indexOf('msgid ""') < 0)) {
-        if (sections[0].match(/msgid "[^"]/)) {
+        if (sections[0].match(/msgid\s+"[^"]/)) {
             //found first real string, adding a dummy header item
             headers.push('msgid ""');
         } else {

lib/po.js

@@ -80,7 +80,7 @@ PO.parse = function (data) {
     var headers = [];
     //everything until the first 'msgid ""' is considered header
     while (sections[0] && (headers.length === 0 || headers[headers.length - 1].indexOf('msgid ""') < 0)) {
-        if (sections[0].match(/msgid "[^"]/)) {
+        if (sections[0].match(/msgid\s+"[^"]/)) {
             //found first real string, adding a dummy header item
             headers.push('msgid ""');
         } else {

test/fixtures/no_header_extra_spaces.po

@@ -0,0 +1,8 @@
+# some comment
+
+msgid   "First id, no header"
+msgstr  ""
+
+msgid   "A second string"
+msgstr  ""
+

test/headers.js

@@ -70,4 +70,24 @@ describe('PO files with no headers', function () {
             assert.equal(po.items.length, 2);
         });
     });
+
+    describe('advanced example with extra spaces', function () {
+        var po;
+
+        before(function (done) {
+            PO.load(__dirname + '/fixtures/no_header_extra_spaces.po', function (err, result) {
+                assert.equal(err, null);
+                po = result;
+                done();
+            });
+        });
+
+        it('Parses the po file', function () {
+            assert.notEqual(po, null);
+        });
+
+        it('Finds all items', function () {
+            assert.equal(po.items.length, 2);
+        });
+    });
 });