add a new template function 'hgdate'
'hgdate' turns a date into a cset timestamp as printed by 'hg export'
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%% uncompressed contents in repo
this is a test
%% uncompress our working dir copy
this is a test
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
%% uncompress our new working dir copy
this is a test