tests/test-hgrc.out

keyword: remove "help keyword" from test

Testing help output does not make sense as we have no way to
check for errors in content which would be the only reasonable
test here.

hg: config error at .../t/.hg/hgrc:1: 'invalid'
updating working directory
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
[paths]
default = .../foo%bar
default = .../foo%bar
bundle.mainreporoot=.../foobar
defaults.backout=-d "0 0"
defaults.commit=-d "0 0"
defaults.tag=-d "0 0"
paths.default=.../foo%bar
ui.slash=True