Merge branch 'fm/user-manual-use-preface'

Doc update to improve git.info * fm/user-manual-use-preface: user-manual.txt: assign preface an id and a title

Junio C Hamano committed Apr 13, 2021 at 15:28 UTC 1d5fbd45c481d989036ed6f7dd10a6c094f9db8f

No changes.