'hg status -q' output skips non-tracked files.
The '-q' flag was ignored in status command. But this flag
can be used to hide non-tracked files in hg status output.
This small correction makes status command more general,
similar to 'svn status', where '-q' flag has the same effect.
The '-u' and '-A' flags have priority over '-q'.
A testcase and doc-string for status was extended to cover
'-q' flag.
#!/bin/sh
hg init a
cd a
hg init b
echo x > b/x
echo '# should print nothing'
hg add b
hg st
echo '# should fail'
hg st b/x
hg add b/x
echo '# should fail'
hg add b b/x
hg st
echo '# should arguably print nothing'
hg st b
echo a > a
hg ci -Ama a
echo '# should fail'
hg mv a b
hg st