commands: improve help for "hg clone -r"

commands, dates: use real lists instead of literal blocks

commands: use field lists instead of literal blocks in docstrings The literal blocks were mis-used for alignment, but this of course changes the font of the entire block to a fixed width font in the HTML version. Using a proper list solves this.

commands: do not indent list in clone help string

run-tests: give each child its own tmp dir (issue1911) Fixes bug introduced by f8b4df4b033d (issue1911: --tmpdir plus parallel mode = fail), and also fixes the long-standing quirk that parallel mode created multiple /tmp/hgtests.XXXXXX directories. Now there is only one /tmp/hgtests.XXXXXX, with child0, child1, etc. under it.

test-non-interactive-wsgi: make output deterministic

hgweb: fix error in 38170eeed18c and introduce test for change

ui: add environ property to access os.environ or wsgirequest.environ The property returns os.environ by default, and is propagated by ui.copy. During hgweb processing, ui.environ is set to the proper WSGI-request environment, as contained in wsgirequest.environ. For CGI, this is the same as os.environ. The property is meant to be read-only, as with os.environ (generally).

relink: wrap long lines in docstring

test-convert-filemap: test improved filtering algorithm