Convert to QUrl before waiting for the logline

webview uses QUrl to output the url and thus might convert some escape
sequences to their unicode characters. If we don't do the same
conversions here, we will "miss" the log message and fail the test.

tests/integration/quteprocess.py

@@ -31,7 +31,7 @@ import tempfile
 
 import yaml
 import pytest
-from PyQt5.QtCore import pyqtSignal
+from PyQt5.QtCore import pyqtSignal, QUrl
 
 import testprocess  # pylint: disable=import-error
 from qutebrowser.misc import ipc
@@ -229,6 +229,7 @@ class QuteProc(testprocess.Process):
     def wait_for_load_finished(self, path, timeout=15000):
         """Wait until any tab has finished loading."""
         url = self._path_to_url(path)
+        url = QUrl(url).toString()
         pattern = re.compile(
             r"(load status for <qutebrowser.browser.webview.WebView "
             r"tab_id=\d+ url='{url}'>: LoadStatus.success|fetch: "