Empty blockcol/rowsupport

[dlfivefifty]

No description provided.

[codecov]

Codecov Report

Merging #112 (5cc0b44) into master (ce65785) will decrease coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #112      +/-   ##
==========================================
- Coverage   85.63%   85.51%   -0.13%     
==========================================
  Files          10       10              
  Lines        1058     1056       -2     
==========================================
- Hits          906      903       -3     
- Misses        152      153       +1     

Impacted Files	Coverage Δ
src/AbstractBlockBandedMatrix.jl	72.05% <100.00%> (ø)
src/BlockBandedMatrices.jl	0.00% <0.00%> (-33.34%)	⬇️
src/broadcast.jl	78.47% <0.00%> (-0.45%)	⬇️
src/blockskylineqr.jl	97.22% <0.00%> (-0.03%)	⬇️

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