[tex-live] Windows 10, TeXLive 2016, and grep

[Br. Samuel Springuel]

Where can I find the applicable documentation for the grep script 
included in TeXLive on Windows?  I.e. the one called with `mtxrun 
-script grep ...`.  In particular I'm interested in knowing which grep 
options are available and which are not.
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Br. Samuel, OSB
St. Anselm’s Abbey
Washington, DC
(R. Padraic Springuel)

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