allow useMoustaches.tokenize.custom(string, string) for custom moustaches

[jhheider]

this would greatly simplify pkgxdev/brewkit#196 which overloads version.raw to allow regexp rewriting in the URLs.

[mxcl]

can you provide the example of why thanks

[jhheider]

yeah... looking back at our exchange in discord, it was about the overloading of version.raw at https://github.com/pkgxdev/brewkit/pull/196/files#diff-4580bd7f95073ce9a8e3d00278a10fe7d2411d1e52d64132691b1a97350e1090R117-R139. that would allow for the definition of a version.rewritten key in that sequence of code that wouldn't necessarily require explicit support in useMoustaches (beyond the generalized case of allowing custom moustache implementations). this means consumers of libpkgx (such as brewkit) could inject their own moustached keys using libpkgx primatives for their specific use-case.

[jhheider]

conversation begins here if you want to slog through it.

[mxcl]

Closing since there are no explicit examples provided.