Merge branch 'dw/diff-highlight-makefile-fix' into maint

Build clean-up. * dw/diff-highlight-makefile-fix: diff-highlight: add clean target to Makefile

Junio C Hamano committed Oct 18, 2017 at 14:19 UTC f77196e3655d974bb281f511e7f89423870e988e

No changes.