Fixed: "grep: Invalid range end" if locale is not C - again

[jkroepke]

No description provided.

[codecov]

Codecov Report

Merging #81 (c230e02) into main (8ec4655) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #81   +/-   ##
=======================================
  Coverage   89.27%   89.27%           
=======================================
  Files          21       21           
  Lines         513      513           
=======================================
  Hits          458      458           
  Misses         55       55           

Impacted Files	Coverage Δ
scripts/drivers/_custom.sh	69.44% <100.00%> (ø)

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