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Args: lookup_obj: Callback for retrieving object by SHA1 path: Path to lookup Returns: A tuple of (mode, SHA) of the resulting path. rN) rr enumerater#rrHr6rr) rrrGpartsr1rKiprfrrr lookup_paths  zTree.lookup_pathrnF)#rrrrr]rrrrrrrrrrrrrrrrrrrrrrrr^rrrrqr7rrrrrrr?s,       $$rcCs|ddvrtdjd it|dd}t|dd}|dkr&| }|dko-|dk}|dkr4dp5d}t|}t|d}|d}||d |d |fS) aParse a timezone text fragment (e.g. '+0100'). Args: text: Text to parse. Returns: Tuple with timezone as seconds difference to UTC and a boolean indicating whether this was a UTC timezone prefixed with a negative sign (-0000). rs+-z(Timezone must start with + or - ({text})Nr -r{d<r)r8rvarsrabs)rrOoffsetunnecessary_negative_timezonesignumhoursminutesrrrparse_timezones   rcCsP|ddkr td|dks|rd}| }nd}d||d|ddfdS) aFormat a timezone for Git serialization. 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