Another pass at errors to make results more predictable

[zix99]

No description provided.

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[codecov-commenter]

Codecov Report

Merging #93 (09874e4) into master (667f8fd) will increase coverage by 0.32%.
The diff coverage is 91.93%.

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@@            Coverage Diff             @@
##           master      #93      +/-   ##
==========================================
+ Coverage   89.59%   89.91%   +0.32%     
==========================================
  Files         104      104              
  Lines        5267     5287      +20     
==========================================
+ Hits         4719     4754      +35     
+ Misses        418      408      -10     
+ Partials      130      125       -5     

Impacted Files	Coverage Δ
pkg/expressions/stdlib/funcsTime.go	90.76% <40.00%> (-1.38%)	⬇️
pkg/expressions/stdlib/funcsCommon.go	90.00% <83.33%> (+15.00%)	⬆️
pkg/expressions/stdlib/funcsRange.go	93.78% <83.33%> (+1.47%)	⬆️
cmd/expressions.go	97.84% <100.00%> (ø)
pkg/expressions/errors.go	97.29% <100.00%> (+0.52%)	⬆️
pkg/expressions/stageAnalysis.go	100.00% <100.00%> (ø)
pkg/expressions/stdlib/drawing.go	100.00% <100.00%> (+7.69%)	⬆️
pkg/expressions/stdlib/funcsArithmatic.go	100.00% <100.00%> (+5.08%)	⬆️
pkg/expressions/stdlib/funcsStrings.go	81.76% <100.00%> (-0.30%)	⬇️