Style fixes.

qutebrowser/browser/downloads.py

@@ -289,7 +289,7 @@ class DownloadItem(QObject):
         download_dir = config.get('storage', 'download-directory')
         if download_dir is None:
             download_dir = standarddir.get(QStandardPaths.DownloadLocation)
-        return download_dir + os.sep
+        return download_dir
 
     def _die(self, msg):
         """Abort the download and emit an error."""
@@ -375,11 +375,13 @@ class DownloadItem(QObject):
         """Get the suggestion of file path"""
         suggestion = config.get('completion', 'download-path-suggestion')
         if suggestion == 'path':
-            return self._download_dir()
+            return self._download_dir() + os.sep
         elif suggestion == 'filename':
             return self.basename
-        else:
+        elif suggestion == 'both':
             return os.path.join(self._download_dir(), self.basename)
+        else:
+            raise ValueError("Invalid suggestion value {}!".format(suggestion))
 
     def delete(self):
         """Delete the downloaded file"""

qutebrowser/config/configdata.py

@@ -306,8 +306,8 @@ DATA = collections.OrderedDict([
 
     ('completion', sect.KeyValue(
         ('download-path-suggestion',
-         SettingValue(typ.DownloadPath(), 'path'),
-         "What to show in the suggestion for the download question."),
+         SettingValue(typ.DownloadPathSuggestion(), 'path'),
+         "What to display in the download filename input."),
 
         ('show',
          SettingValue(typ.Bool(), 'true'),

qutebrowser/config/configtypes.py

@@ -1416,7 +1416,7 @@ class NewInstanceOpenTarget(BaseType):
                                ('window', "Open in a new window."))
 
 
-class DownloadPath(BaseType):
+class DownloadPathSuggestion(BaseType):
 
     """How to format the question when downloading."""