redundancy msg filter

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #294 (d0f2488) into master (d723887) will decrease coverage by 0.16%.
The diff coverage is 26.66%.

@@            Coverage Diff             @@
##           master     #294      +/-   ##
==========================================
- Coverage   38.71%   38.54%   -0.17%     
==========================================
  Files          11       11              
  Lines        2374     2384      +10     
==========================================
  Hits          919      919              
- Misses       1368     1377       +9     
- Partials       87       88       +1     

Impacted Files	Coverage Δ
backend/handler.go	51.38% <13.33%> (-0.77%)	⬇️
fs.go	30.84% <40.00%> (-0.08%)	⬇️

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