Fix diagblockshift with cachedvector (Fixes bug in SingularIntegralEq…

[dlfivefifty]

…uations.jl)

[codecov]

Codecov Report

Merging #71 (802d3f5) into master (ffad968) will increase coverage by 0.08%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master     #71      +/-   ##
=========================================
+ Coverage    6.14%   6.23%   +0.08%     
=========================================
  Files          75      75              
  Lines        7258    7268      +10     
=========================================
+ Hits          446     453       +7     
- Misses       6812    6815       +3     

Impacted Files	Coverage Δ
src/ApproxFunBase.jl	50.00% <ø> (ø)
src/Caching/blockbanded.jl	0.00% <0.00%> (ø)
src/Fun.jl	11.32% <0.00%> (+0.04%)	⬆️
src/Operators/banded/CalculusOperator.jl	11.57% <0.00%> (+0.94%)	⬆️
src/Operators/Operator.jl	6.48% <0.00%> (+1.28%)	⬆️
src/Operators/functionals/CalculusFunctional.jl	12.90% <0.00%> (+2.90%)	⬆️

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