Update File, Directory and Path asserts and constraints

[CharliePoole]

@CharliePoole commented on Fri Sep 26 2014

Directory Assert will have to be re-added, since it was removed. You can copy from 2.6.3.
You might combine file and directory assert in one page, but we could also leave that for the beta docs, which will likely be in a new form.

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@CharliePoole commented on Wed Aug 03 2016

This may be done... I'm not sure.

[SeanKilleen]

🧹 Housekeeping: Closing this older issue, as it is no longer relevant.