unidiff: handle empty diffs more gracefully
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unidiff: handle empty diffs more gracefully
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--- a/mercurial/mdiff.py Wed Jun 08 10:46:39 2005 -0800
+++ b/mercurial/mdiff.py Wed Jun 08 10:47:10 2005 -0800
@@ -27,6 +27,7 @@
a = a.splitlines(1)
b = b.splitlines(1)
l = list(difflib.unified_diff(a, b, "a/" + fn, "b/" + fn))
+ if not l: return ""
# difflib uses a space, rather than a tab
l[0] = l[0][:-2] + "\t" + ad + "\n"
l[1] = l[1][:-2] + "\t" + bd + "\n"