Fix various speling errars in Core and Extras

[JensAyton]

No description provided.

[codecov]

Codecov Report

Merging #171 (e5ce3a2) into master (efb26fe) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #171   +/-   ##
=======================================
  Coverage   94.36%   94.36%           
=======================================
  Files          43       43           
  Lines        1278     1278           
=======================================
  Hits         1206     1206           
  Misses         72       72           

Flag	Coverage Δ
ios	94.36% <100.00%> (ø)
macspm	94.31% <100.00%> (ø)

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Impacted Files	Coverage Δ
MobiusCore/Source/ConcurrentAccessDetector.swift	45.45% <ø> (ø)
...sCore/Source/Disposables/CompositeDisposable.swift	100.00% <ø> (ø)
MobiusCore/Source/MobiusLoop.swift	100.00% <ø> (ø)
MobiusCore/Source/WorkBag.swift	100.00% <ø> (ø)
MobiusCore/Source/MobiusController.swift	98.68% <100.00%> (ø)
MobiusExtras/Source/ConnectableClass.swift	77.35% <100.00%> (ø)

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