hgview #73678 less than useful error message when hg.repository() fails [validation pending]

when hg.repository() fails for some reason, we should propagate the error message instead of just saying "You are not in a repo, are you?"

appeared in<not specified>
done in1.6.0
load left0.000
debian bug number634931
closed by#83e1f6d0ffa3 Propagate errors from mercurial.hg.repository() (closes: #73678)