Fix issue #9477: spacemacs/smart-closing-parenthesis sometimes adds an
extra closing parenthesis.
spacemacs/smart-closing-parenthesis may call sp-up-sexp twice: first to
find the position of an existing closing delimiter or the position at which
one would be inserted, and second to insert a delimiter if necessary or
else move point after the existing closing delimiter.
The problem is that each call to sp-up-sexp may insert a delimiter, but
spacemacs/smart-closing-parenthesis is supposed to insert at most one.
The solution is to undo any edit performed by the first call to sp-up-sexp.
* layers/+spacemacs/spacemacs-editing/funcs.el: Undo any edit performed by
the first call to sp-up-sexp.
Choose to inherit from face lazy-highlight instead of region.
Ideally a theme should not set lazy-highlight to the same face as
region.
Also move some function to funcs.el and remove some empty lines.
