Enable smartparens for algebraic entry in calc
Correct ielm mode name in cb:lisp-modes group
Remove lexical binding from file local vars

Lexical binding should instead be set in the prop line.

Since it has not been set correctly, this config is still using
dynamic binding and using lexical binding at this stage could
introduce subtle errors.
bind M-RET and C-j to newline-and-indent in ielm
Fix sp close parens command regression