Fix: Double range removal when completion.range present

[mkslanc]

Issue #, if available:

Description of changes:

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02 🎉

Comparison is base (c910951) 87.22% compared to head (4109e74) 87.24%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5249      +/-   ##
==========================================
+ Coverage   87.22%   87.24%   +0.02%     
==========================================
  Files         565      565              
  Lines       45251    45297      +46     
  Branches     6927     6928       +1     
==========================================
+ Hits        39469    39519      +50     
+ Misses       5782     5778       -4     

Flag	Coverage Δ
unittests	87.24% <100.00%> (+0.02%)	⬆️

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Impacted Files	Coverage Δ
src/autocomplete.js	81.48% <100.00%> (ø)
src/autocomplete_test.js	97.81% <100.00%> (+0.13%)	⬆️

... and 7 files with indirect coverage changes

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