Cleanup master branch after rsw branch merge

[matsl]

What

• hactypes.el (link-to-org-id): Fix quote in docstring.

• hibtypes.el (hywiki-get-existing-page-file):
  (hywiki-word-from-reference): Declare functions.

• hpath.el (hywiki-get-existing-page-file):
  (hywiki-get-referent):
  (hywiki-org-to-heading-instance):
  (org-element-property): Declare functions.
  (hywiki-directory): Defvar.
  (hpath:org-normalize-title):
  (hpath:org-normalize-titles): Rephrase long docstrings to fit in 80 chars.

• hsys-org.el (org-uuid-regexp): Defvar.
  (hsys-org-link-at-p): Remove unused var: label.

• hui.el (hywiki-mode): Defvar
  (hywiki-get-buffer-page-name):
  (hywiki-in-page-p):
  (hywiki-org-format-heading):
  (hywiki-org-get-heading-match-regexp): Declare functions.

• hypb.el (hypb:in-string-p): Remove unused var: close-match-string. Mark
  close-regexp as unused.

• hywiki.el (hywiki-org-format-heading):
  (org-fold-core-remove-optimisation):
  (org-fold-core-update-optimisation):
  (org-fold-show-entry): Declare functions.
  (hywiki-add-org-id): Fix quote in docstring.

Why

Silences byte compile warning messages.

Note

There are a two unused variables warnings. This PR assume that these
are left overs but it could also mean the code was not committed in a
finished state.

[rswgnu]

@matsl Fix the one comment and then approved.

[rswgnu]

"hui.el:L2077" uses this title argument, so please remove the above change.

[rswgnu]

@matsl , see above. Make this one change and then good to go. No further approval needed.

[matsl]

The change does not invalidate calling it. It just silences the warning since the title argument is not used.

So am I right to assume that we will soon add some implementation using title in this defact? Since when I think about it now an optional parameter that is not used would be a good candidate to delete. Unless that is, it is needed due to some "framework" using it so it has to be there. But that would not be the case here I think.

Anyway, I'll remove it and we have the warning as a reminder that we need to fix the implmentation so that it uses the argument.