More general truncation and slicing

[mtfishman]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 65.62500% with 11 lines in your changes missing coverage. Please review.

Project coverage is 75.95%. Comparing base (97a3c14) to head (2b00657).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/BlockArraysExtensions/blockedunitrange.jl	0.00%	6 Missing ⚠️
src/BlockArraysExtensions/blockrange.jl	0.00%	3 Missing ⚠️
src/abstractblocksparsearray/views.jl	86.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #159      +/-   ##
==========================================
- Coverage   76.95%   75.95%   -1.00%     
==========================================
  Files          36       36              
  Lines        2035     2059      +24     
==========================================
- Hits         1566     1564       -2     
- Misses        469      495      +26     

Flag	Coverage Δ
docs	7.24% <0.00%> (-0.09%)	⬇️

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