Replace sizeof with lastindex

[davidanthoff]

Those are all instances of sizeof in this package. I'm fairly positive that they should all be replaced with lastindex, but not 100% sure, so would be great if @ZacLN could review carefully :)

[codecov[bot]]

Codecov Report

Merging #75 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff           @@
##           master     #75   +/-   ##
======================================
  Coverage    77.8%   77.8%           
======================================
  Files           4       4           
  Lines         401     401           
======================================
  Hits          312     312           
  Misses         89      89

Impacted Files	Coverage Δ
src/utils.jl	58.82% <100%> (ø)	:arrow_up:
src/passes.jl	71.09% <100%> (ø)	:arrow_up:

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[ZacLN]

I'm pretty sure edits are measured against and made to the underlying UInt8 array (https://github.com/julia-vscode/DocumentFormat.jl/blob/master/src/DocumentFormat.jl#L181-L184) so sizeof should be applicable here. I've lost sense of how this all works so am slightly wary of making changes if its not in response to an actual error/crash

[davidanthoff]

Hm, but at least the change for utils.jl is definitely on a String, right?

[ZacLN]

I suppose so, lets give it a shot