Problem committing tests

[Stephen Berman]

I wanted to include some tests with the fix for bug#27121 that I just
committed to master (d76c007); however, git complained about trailing
whitespace in two data files for the tests.  This whitespace is part of
the file format used by todo-mode.el, so I cannot delete it.  I see that
the .gitattributes file in the repository lists several test files for
which whitespace warnings should be ignored; should I add the todo-mode
test data files to the list?  Or is there another or better way to tell
git to ignore this whitespace and commit the files?

Steve Berman