Here is a quick test case for a word-diff error, using v1.7.10.4
(debian wheezy package).
Setting up:
tmp$ mkdir foo && cd foo
foo$ git init
Initialized empty Git repository in /tmp/foo/.git/
foo (master)$ echo '*.py diff=python' > .gitattributes
foo (master)$ echo 'for name in bar.blurb:' > v1.py
foo (master)$ echo 'for name in foo.bar.blurb:' > v2.py
This looks fine:
foo (master)$ git diff --no-index --word-diff=plain v1.py v2.py
diff --git a/v1.py b/v2.py
index a6a079d..2832331 100644
--- a/v1.py
+++ b/v2.py
@@ -1 +1 @@
for name in {+foo.+}bar.blurb:
This however is not:
foo (master)$ git diff --no-index --word-diff=plain v2.py v1.py
diff --git a/v2.py b/v1.py
index 2832331..a6a079d 100644
--- a/v2.py
+++ b/v1.py
@@ -1 +1 @@
for name in[-foo.-] bar.blurb:
--
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