RFC patch, 3 partsMore fool-proof "git rebase --whitespace=fix"

This is the first step in making sure that "git rebase --whitespace=fix HEAD~<number>" will never fail.

As suggested by Junio, the first step consists in changing "git apply whitespace=fix" to be smarter about previously deleted blank lines at the end of the file.

I would be grateful for any feedback on the design decisions and the implementation.

Björn Gustavsson (3):
  apply: Allow blank context lines to match beyond EOF
  t4124: Add additional tests of --whitespace=fix
  t3417: Add test cases for "rebase --whitespace=fix"

 builtin-apply.c                  |  127 ++++++++++++++++++++++++++++++++------
 t/t3417-rebase-whitespace-fix.sh |  126 +++++++++++++++++++++++++++++++++++++
 t/t4124-apply-ws-rule.sh         |   12 ++++
 3 files changed, 246 insertions(+), 19 deletions(-)
 create mode 100755 t/t3417-rebase-whitespace-fix.sh