add missing QuoteNode in last commit
fix potential bug in codegen of "empty" arguments (e.g. (), nothing) that
have a memvalue due to being assigned.
Doc: fix malformed tables in linalg
Doc: update darray -> DArray cross-references

Fix some spelling and punctuation also.
copy!(S::SharedArray, A::Array) should return S
Merge pull request #6519 from tanmaykm/sharedarray

copy!(S::SharedArray, A::Array) should return S
add readlines(). closes #6511