Merge branch 'jc/doc-diff-filter-exclude' into maint

Belated doc update for a feature added in v1.8.5. * jc/doc-diff-filter-exclude: diff: document diff-filter exclusion

Junio C Hamano committed Aug 8, 2016 at 14:21 UTC 2f8c654edb0c8805749c60228ad9abb5984fba63

No changes.