Don’t post-process the MessageFormat output in __mf

[andersk]

The output from the MessageFormat compiled function may contain arbitrary user-provided content, and cannot safely be re-parsed as an interval string, Mustache template, or printf format string.

• Fixes __mf incorrectly re-parses output as Mustache #544.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 97.99%. Comparing base (fcb0781) to head (0e7d0da).

Files with missing lines	Patch %	Lines
i18n.js	66.66%	1 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #546      +/-   ##
==========================================
- Coverage   98.17%   97.99%   -0.18%     
==========================================
  Files           2        2              
  Lines         548      549       +1     
==========================================
  Hits          538      538              
- Misses         10       11       +1     

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[mashpie]

thanks again... :)

as the current implementation with enabled post-processing is in use for more than a decade, I would consider this a breaking change which requires a new release plus fallback opt-in to enable legacy behavior and docs.

There is at least one other PR that I wanted to merge before pushing new releases. So stay tuned.