Edits to generic `add`, `BlockDiagLinearOperator`'s `matmul`, and documentation#10

Merged

Balandat merged 2 commits intocornellius-gp:mainfrom SebastianAment:add-matmul-edits

Sep 8, 2022

+35-19

Commits on Sep 7, 2022

deepcopy in add, size check in BlockDiag matmul, doc edits
SebastianAment
committed

Commits on Sep 8, 2022

added shape check in constructor of block diag op, added notes about skipped tests
SebastianAment
committed