Added test for whitespace in playlist

+{
+  "allowCache": true,
+  "mediaSequence": 0,
+  "playlistType": "VOD",
+  "segments": [
+    {
+      "duration": 10,
+      "uri": "http://example.com/00001.ts"
+    },
+    {
+      "duration": 10,
+      "uri": "https://example.com/00002.ts"
+    },
+    {
+      "duration": 10,
+      "uri": "//example.com/00003.ts"
+    },
+    {
+      "duration": 10,
+      "uri": "http://example.com/00004.ts"
+    }
+  ],
+  "targetDuration": 10,
+  "endList": true
+}
\ No newline at end of file

+#EXTM3U
+#EXT-X-PLAYLIST-TYPE:VOD
+#EXT-X-TARGETDURATION:10
+    
+#EXTINF:10,
+http://example.com/00001.ts 
+#EXTINF:10,
+ https://example.com/00002.ts
+#EXTINF:10,
+ //example.com/00003.ts 
+#EXTINF:10,
+	http://example.com/00004.ts
+#ZEN-TOTAL-DURATION:57.9911
+#EXT-X-ENDLIST