check-code: add a rule against a GNU sed-ism BSD sed requires the 'i' command to be followed with a backslash and a newline, like so: $ sed -e '/^@/i\ > other' We've encountered this problem before, e.g. in test-mq.t (900767dfa80d). This change adds a check-code rule and fixes two instances of the problem in test-record.t.

hgweb: make help verbose again (issue3899) Due to regression introduced in f5db3092790f, help in hgweb was rendered in non-verbose form (issue3899)

merge with i18n

i18n-pt_BR: synchronized with 64ea454e7d76

css: remove repeated property 'margin' property was repeated for the same selector

css: fixed font-family There is no 'sans' font-family, replaced with 'sans-serif'

color: add a test with extension loaded and ui.formatted=False