Merge branch 'ja/doc-cleanup'

Doc update. * ja/doc-cleanup: init doc: --shared=0xxx does not give umask but perm bits doc: git-init: clarify file modes in octal. doc: git-http-push: describe the refs as pattern pairs doc: uniformize <URL> placeholders' case doc: use three dots for indicating repetition instead of star doc: git-ls-files: express options as optional alternatives doc: use only hyphens as word separators in placeholders doc: express grammar placeholders between angle brackets doc: split placeholders as individual tokens doc: fix git credential synopsis