[darcs-users] darcs patch: use read_repo instead of get_unrecorded in Changes

[Benedikt Schmidt]

One of the patches just simplifies a function in TouchesFile.

The other one fixes (at least I hope so) a problem I notices when
testing the the filecache version on the ghc repo:

Darcs changes FOO checks if FOO is known under another name in the repo,
i.e. there is an unrecorded patch that moves FOO. Previously, darcs  
first
computed all unrecorded changes, then computed the new filename from
these changes. Now it only checks pending which is of course much  
faster.

   Benedikt

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