Fix nightly clippy warning

[Nemo157]

bors r+

[codecov[bot]]

Codecov Report

Merging #123 (064e4fb) into prīmum (858993c) will increase coverage by 0.15%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           prīmum     #123      +/-   ##
==========================================
+ Coverage   93.53%   93.69%   +0.15%     
==========================================
  Files          17       17              
  Lines        2631     2631              
==========================================
+ Hits         2461     2465       +4     
+ Misses        170      166       -4     

Impacted Files	Coverage Δ
src/encode/diag.rs	90.80% <100.00%> (+0.36%)	:arrow_up:
src/encode/hex.rs	82.15% <0.00%> (+0.46%)	:arrow_up:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[bors[bot]]

Build succeeded:

• success