view doc/README @ 48282:0d6a099bba58

dirstate: group return logic and clarify each function in flagfunc

As suggested by spectral during review of my fix of the missing return, this
makes it more obvious that all cases are covered and improves readability of
the functions with new names and a small docstring.

Differential Revision: https://phab.mercurial-scm.org/D11715

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