Change name of test_selection_replace_plain_regex.

Because it use normal replace not replace in selection.

spyder/widgets/tests/test_editor.py

@@ -320,19 +320,17 @@ def test_replace_enter_press(editor_find_replace_bot):
     qtbot.keyPress(finder.search_text, Qt.Key_Return, modifier=Qt.ShiftModifier)
     assert editor.get_cursor_line_column() == (3,4)
 
-def test_selection_replace_plain_regex(editor_find_replace_bot):
+def test_replace_plain_regex(editor_find_replace_bot):
     """Test that regex reserved characters are displayed as plain text."""
     editor_stack, editor, finder, qtbot = editor_find_replace_bot
     expected_new_text = ('.\\[()]*test bacon\n'
                          'spam sausage\n'
                          'spam egg')
-    old_text = editor.toPlainText()
     finder.show()
     finder.show_replace()
     qtbot.keyClicks(finder.search_text, 'spam')
     qtbot.keyClicks(finder.replace_text, '.\[()]*test')
     qtbot.keyPress(finder.replace_text, Qt.Key_Return)
-    text = editor.toPlainText()[0:-1]
     assert editor.toPlainText()[0:-1] == expected_new_text
 
 def test_replace_invalid_regex(editor_find_replace_bot):