fix bug for tuples; fix == and !=. Closes #25.

[winitzki]

Fixes the tuples bug, due to incorrect comparison; fix == and !=. Closes #25.

[codecov]

Codecov Report

Merging #26 into master will increase coverage by 0.95%.
The diff coverage is 92.04%.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
+ Coverage   91.23%   92.18%   +0.95%     
==========================================
  Files           9        8       -1     
  Lines         650      678      +28     
  Branches       63       59       -4     
==========================================
+ Hits          593      625      +32     
+ Misses         57       53       -4

Impacted Files	Coverage Δ
src/main/scala/io/chymyst/ch/LJT.scala	98.64% <100%> (ø)	⬆️
src/main/scala/io/chymyst/ch/Macros.scala	100% <100%> (ø)	⬆️
src/main/scala/io/chymyst/ch/Monoid.scala	100% <100%> (ø)	⬆️
src/main/scala/io/chymyst/ch/TypeExpr.scala	83.48% <83.87%> (+1.38%)	⬆️
src/main/scala/io/chymyst/ch/TermExpr.scala	90.31% <96%> (+1.26%)	⬆️

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