Fix typos in docstrings.

Fix typos in docstrings.

* outline.el (outline-head-from-level):
* simple.el (with-wrapper-hook):
* cedet/ede.el (ede-run-target, project-delete-target)
  (project-dist-files, ede-name, ede-documentation, ede-parent-project)
  (ede-adebug-project, ede-adebug-project-parent)
  (ede-adebug-project-root):
* emacs-lisp/elint.el (elint-extra-errors, elint-current-buffer)
  (elint-defun, elint-buffer-env, elint-top-form-logged)
  (elint-unbound-variable):
* textmodes/reftex-toc.el (reftex-toc-newhead-from-alist):