The test t4051-diff-function-context.sh passes on Linux when
core.autocrlf=true even without marking its support files as LF-only,
but they fail when core.autocrlf=true in Git for Windows' SDK.

The reason is that `grep ... >file.c.new` will keep CR/LF line endings
on Linux (obviously treating CRs as if they were regular characters),
but will be converted to LF-only line endings with MSYS2's grep that is
used in Git for Windows.

As we do not want to validate the way the available `grep` works, let's
just mark the input as LF-only and move on.

Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
Reviewed-by: Jonathan Nieder <jrnie...@gmail.com>
---
 t/.gitattributes | 1 +
 1 file changed, 1 insertion(+)

diff --git a/t/.gitattributes b/t/.gitattributes
index 11e5fe37281..3bd959ae523 100644
--- a/t/.gitattributes
+++ b/t/.gitattributes
@@ -6,6 +6,7 @@ t[0-9][0-9][0-9][0-9]/* -whitespace
 /t4034/*/* eol=lf
 /t4013/* eol=lf
 /t4018/* eol=lf
+/t4051/* eol=lf
 /t4100/* eol=lf
 /t4101/* eol=lf
 /t4109/* eol=lf
-- 
2.12.2.windows.2.800.gede8f145e06

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