If rerere is enabled, no pathnames are given, and mergetool is run
from a subdirectory, mergetool always prints "No files need merging".
Fix the bug.

This regression was introduced in
57937f70a09c12ef484c290865dac4066d207c9c (v2.11.0).

Richard Hansen (4):
  t7610: update branch names to match test number
  t7610: make tests more independent and debuggable
  t7610: add test case for rerere+mergetool+subdir bug
  mergetool: fix running in subdir when rerere enabled

 git-mergetool.sh     |   1 +
 t/t7610-mergetool.sh | 132 ++++++++++++++++++++++++++++++++++-----------------
 2 files changed, 90 insertions(+), 43 deletions(-)

-- 
2.11.0.390.gc69c2f50cf-goog