validate capture empty string

[kaplanelad]

Skip redaction when capture is empty

[codecov-commenter]

Codecov Report

Base: 98.73% // Head: 98.75% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (bd3459b) compared to base (1e612c9).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   98.73%   98.75%   +0.02%     
==========================================
  Files           5        5              
  Lines         554      564      +10     
==========================================
+ Hits          547      557      +10     
  Misses          7        7              

Impacted Files	Coverage Δ
redact-engine/src/pattern.rs	99.27% <100.00%> (+0.05%)	⬆️

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