(widget-default-create, widget-after-change, widget-default-format-handler,

(widget-default-create, widget-after-change, widget-default-format-handler,
widget-checklist-add-item, widget-radio-add-item, widget-choose,
widget-specify-secret, widget-field-value-create, widget-field-value-get,
widget-editable-list-format-handler, widget-editable-list-entry-create,
widget-group-value-create, widget-documentation-link-add,
widget-documentation-string-value-create): "?\ " -> "?\s".
(widget-convert-text): Doc fix.
(widget-narrow-to-field, widget-field-find, widget-url-link-action,
widget-emacs-library-link-action, widget-color-notify): Fix typos in docstrings.