fix: fix tab-space mix with tab indenation and continuation_align_style=SPACE

Author: spaceone

yapf/yapflib/format_token.py

@@ -77,7 +77,9 @@ def _TabbedContinuationAlignPadding(spaces, align_style, tab_width):
     if spaces > 0:
       return '\t' * int((spaces + tab_width - 1) / tab_width)
     return ''
-  return ' ' * spaces
+  if spaces % tab_width == 0:
+    return '\t' * (spaces // tab_width)
+  return ' ' * spaces  # TODO: add a comment why we indent with spaces in a tab area?
 
 
 class FormatToken(object):

yapftests/format_token_test.py

@@ -30,7 +30,7 @@ def testSpace(self):
     self.assertEqual(pad, '')
 
     pad = format_token._TabbedContinuationAlignPadding(2, align_style, 2)
-    self.assertEqual(pad, ' ' * 2)
+    self.assertEqual(pad, '\t')
 
     pad = format_token._TabbedContinuationAlignPadding(5, align_style, 2)
     self.assertEqual(pad, ' ' * 5)

yapftests/yapf_test.py

@@ -1268,8 +1268,8 @@ def f():
     expected_formatted_code = """\
 def f():
 	return [
-	    'hello',
-	    'world',
+		'hello',
+		'world',
 	]
 """
     style_contents = u"""\