Fix flake8 failures

qutebrowser/browser/webengine/webengineelem.py

@@ -134,7 +134,7 @@ class WebEngineElement(webelem.AbstractWebElement):
         self._js_call('set_value', value)
 
     def caret_position(self):
-        """Get the text caret position for the current element"""
+        """Get the text caret position for the current element."""
         return self._js_dict.get('caret_position', 0)
 
     def insert_text(self, text):

qutebrowser/browser/webkit/webkitelem.py

@@ -127,7 +127,7 @@ class WebKitElement(webelem.AbstractWebElement):
             self._elem.evaluateJavaScript("this.value='{}'".format(value))
 
     def caret_position(self):
-        """Get the text caret position for the current element"""
+        """Get the text caret position for the current element."""
         self._check_vanished()
         pos = self._elem.evaluateJavaScript('this.selectionStart')
         assert isinstance(pos, (int, float, type(None)))

qutebrowser/misc/editor.py

@@ -150,7 +150,7 @@ class ExternalEditor(QObject):
         self._proc.start(executable, args)
 
     def _calc_line_and_column(self, text, caret_position):
-        """Calculate line and column numbers given a text and caret position
+        r"""Calculate line and column numbers given a text and caret position.
 
         Both line and column are 1-based indexes, because that's what most
         editors use as line and column starting index.  By "most" we mean at

tests/unit/misc/test_editor.py

@@ -190,5 +190,5 @@ def test_modify(qtbot, editor, initial_text, edited_text):
     ('a\nbb\nccc', 8, (3, 4)),
 ])
 def test_calculation(editor, text, caret_position, result):
-    """Test calculation for line and column given text and caret_position"""
+    """Test calculation for line and column given text and caret_position."""
     assert editor._calc_line_and_column(text, caret_position) == result