whitespace: tests for git-diff --check with tab-in-indent error class
whitespace: tests for git-diff --check with tab-in-indent error class

[jc: with test fixes from J6t]

Signed-off-by: Chris Webb <711c73f64afdce07b7e38039a96d2224209e9a6c@arachsys.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git