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-rw-r--r--Lib/difflib.py9
-rw-r--r--Lib/test/test_difflib.py8
2 files changed, 13 insertions, 4 deletions
diff --git a/Lib/difflib.py b/Lib/difflib.py
index 052a627e214..264860e2a38 100644
--- a/Lib/difflib.py
+++ b/Lib/difflib.py
@@ -1060,20 +1060,21 @@ class Differ:
Example:
>>> d = Differ()
- >>> results = d._qformat('\tabcDefghiJkl\n', '\t\tabcdefGhijkl\n',
- ... ' ^ ^ ^ ', '+ ^ ^ ^ ')
+ >>> results = d._qformat('\tabcDefghiJkl\n', '\tabcdefGhijkl\n',
+ ... ' ^ ^ ^ ', ' ^ ^ ^ ')
>>> for line in results: print(repr(line))
...
'- \tabcDefghiJkl\n'
'? \t ^ ^ ^\n'
- '+ \t\tabcdefGhijkl\n'
- '? \t ^ ^ ^\n'
+ '+ \tabcdefGhijkl\n'
+ '? \t ^ ^ ^\n'
"""
# Can hurt, but will probably help most of the time.
common = min(_count_leading(aline, "\t"),
_count_leading(bline, "\t"))
common = min(common, _count_leading(atags[:common], " "))
+ common = min(common, _count_leading(btags[:common], " "))
atags = atags[common:].rstrip()
btags = btags[common:].rstrip()
diff --git a/Lib/test/test_difflib.py b/Lib/test/test_difflib.py
index c314b537667..852aae9b31e 100644
--- a/Lib/test/test_difflib.py
+++ b/Lib/test/test_difflib.py
@@ -20,6 +20,14 @@ class TestSFbugs(unittest.TestCase):
diff_gen = difflib.unified_diff([], [])
self.assertRaises(StopIteration, next, diff_gen)
+ def test_added_tab_hint(self):
+ # Check fix for bug #1488943
+ diff = list(difflib.Differ().compare(["\tI am a buggy"],["\t\tI am a bug"]))
+ self.assertEqual("- \tI am a buggy", diff[0])
+ self.assertEqual("? --\n", diff[1])
+ self.assertEqual("+ \t\tI am a bug", diff[2])
+ self.assertEqual("? +\n", diff[3])
+
patch914575_from1 = """
1. Beautiful is beTTer than ugly.
2. Explicit is better than implicit.