obsolete: extract the part of _readmarkers specific to format version 0
If we are to introduce new formats we need to be able call different
functions for different formats. Creating a function for format
version 0 is the first step.
Mercurial
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Mercurial is a fast, easy to use, distributed revision control tool
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Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing:
$ make local # build for inplace usage
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See http://mercurial.selenic.com/ for detailed installation
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