Range-diff !471

back to !471 CLI output: docs, review fixes, changelog

1:  2229c1a = 1:  dd06e80 docs: terminal output rules, sshd note, changelog
2:  8a08bd1 = 2:  1712c81 gitbay: GITBAY_TERM=off sends no terminal size
3:  e760262 = 3:  f513f70 control: --term only first, never over HTTP
4:  8ee04e3 = 4:  037e004 control: control bytes in user text never reach the terminal
5:  c280968 = 5:  4b7a42d view: every sub-table under a section label
6:  84a5fec = 6:  dd23d17 control: gofmt the generated summaries; drop unused helpers
7:  1f68760 = 7:  5ed0f4f control: termSafe drops carriage returns