* sly.el (sly-init-using-asdf): Fix byte-compilation warning.
Fix compilation warnings before focusing on tests

* contrib/sly-c-p-c.el (sly-c-p-c, sly-c-p-c-init-undo-stack): Don't use
this undo-stack technique, contrib unloading must be done
differently.

* contrib/sly-package-fu.el (sly-package-fu)
(sly-package-fu-init-undo-stack): Don't use this undo-stack
technique, contrib unloading must be done differently.

* contrib/sly-sprof.el (sly-sprof-browser-mode-map): Don't use
sly-parent-map.

* contrib/test/sly-autodoc-tests.el (sly-autodoc-to-string): Use
`sly-autodoc--make-rpc-form'. Don't use
`sly-canonicalize-whitespace'.