export transpose! and ctranspose!
fix transpose! for sparse
fix `@doc` for abstract types
Merge pull request #8981 from mauro3/doc_abstract

fix `@doc`  for abstract types
Merge pull request #7814 from Jutho/jh/exporttranspose!

export transpose! and ctranspose!
support recursive emphasis elements
tweak terminal output
add new help string
move new repl help