copies: move debug statement to appropriate place

bidmerge: choose shortest list of diverge and rename/delete warnings Slightly less arbitrary than choosing the first set.

copies: rename diverge2 to divergeset for clarity

copies: begin separating mergecopies sides

copies: rename ctx() to getfctx() for clarity

monoblue: port code selection without line numbers from gitweb This is adapted from 2239626369f5. It also fixes issue4790 in monoblue; tab characters now have meaningful width on the modified pages (file view, file diff, changeset).

help: copy-edit description of ui.supportcontact