fix == on Reductions

[MasonProtter]

Closes #540

[codecov]

Codecov Report

Merging #545 (a7e7ea1) into master (bd958e4) will decrease coverage by 0.58%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #545      +/-   ##
==========================================
- Coverage   95.43%   94.84%   -0.59%     
==========================================
  Files          32       32              
  Lines        2232     2231       -1     
==========================================
- Hits         2130     2116      -14     
- Misses        102      115      +13     

Flag	Coverage Δ
Pkg.test	94.46% <100.00%> (-0.09%)	⬇️
Run.test	94.71% <100.00%> (-0.50%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/core.jl	92.12% <100.00%> (-0.90%)	⬇️
src/basics.jl	88.88% <0.00%> (-5.56%)	⬇️
src/partitionby.jl	90.90% <0.00%> (-3.90%)	⬇️
src/nondeterministic_threading.jl	88.77% <0.00%> (-2.05%)	⬇️
src/reduce.jl	94.59% <0.00%> (-1.84%)	⬇️
src/progress.jl	91.58% <0.00%> (-0.94%)	⬇️
src/library.jl	98.70% <0.00%> (+0.25%)	⬆️

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