Merge branch 'ah/doc-empty-string-is-false'

Doc update. * ah/doc-empty-string-is-false: doc: clarify "config --bool" behaviour with empty string

Junio C Hamano committed Aug 23, 2017 at 14:13 UTC 76be4487f08d40bd1dba0d5b0dcbd2513ca26e8c

No changes.