Fix a bunch of custom types (thank you cus-test.el)

* lisp/bookmark.el (bookmark-search-delay):
* lisp/cus-start.el (vertical-centering-font-regexp):
* lisp/ps-mule.el (ps-mule-font-info-database-default):
* lisp/ps-print.el (ps-default-fg, ps-default-bg):
* lisp/type-break.el (type-break-good-break-interval):
* lisp/whitespace.el (whitespace-indentation-regexp)
(whitespace-space-after-tab-regexp):
* lisp/emacs-lisp/testcover.el (testcover-1value-functions)
(testcover-noreturn-functions, testcover-progn-functions)
(testcover-prog1-functions):
* lisp/emulation/viper-init.el (viper-emacs-state-cursor-color):
* lisp/erc/erc-desktop-notifications.el (erc-notifications-icon):
* lisp/eshell/em-glob.el (eshell-glob-translate-alist):
* lisp/gnus/gnus-art.el (gnus-article-date-headers, gnus-blocked-images):
* lisp/gnus/gnus-async.el (gnus-async-post-fetch-function):
* lisp/gnus/gnus-gravatar.el (gnus-gravatar-size, gnus-gravatar-properties):
* lisp/gnus/gnus-html.el (gnus-html-image-cache-ttl):
* lisp/gnus/gnus-notifications.el (gnus-notifications-timeout):
* lisp/gnus/gnus-picon.el (gnus-picon-properties):
* lisp/gnus/gnus-util.el (gnus-completion-styles):
* lisp/gnus/gnus.el (gnus-other-frame-resume-function):
* lisp/gnus/message.el (message-user-organization-file)
(message-cite-reply-position):
* lisp/gnus/nnir.el (nnir-summary-line-format)
(nnir-retrieve-headers-override-function):
* lisp/gnus/shr-color.el (shr-color-visible-luminance-min):
* lisp/gnus/shr.el (shr-blocked-images):
* lisp/gnus/spam-report.el (spam-report-resend-to):
* lisp/gnus/spam.el (spam-summary-exit-behavior):
* lisp/mh-e/mh-e.el (mh-sortm-args, mh-default-folder-for-message-function):
* lisp/play/tetris.el (tetris-tty-colors):
* lisp/progmodes/cpp.el (cpp-face-default-list):
* lisp/progmodes/flymake.el (flymake-allowed-file-name-masks):
* lisp/progmodes/idlw-help.el (idlwave-help-browser-generic-program)
(idlwave-help-browser-generic-args):
* lisp/progmodes/make-mode.el (makefile-special-targets-list):
* lisp/progmodes/python.el (python-shell-virtualenv-path):
* lisp/progmodes/verilog-mode.el (verilog-active-low-regexp)
(verilog-auto-input-ignore-regexp, verilog-auto-inout-ignore-regexp)
(verilog-auto-output-ignore-regexp, verilog-auto-tieoff-ignore-regexp)
(verilog-auto-unused-ignore-regexp, verilog-typedef-regexp):
* lisp/textmodes/reftex-vars.el (reftex-format-label-function):
* lisp/textmodes/remember.el (remember-diary-file):
Fix custom types.

* lisp/cedet/semantic/db-find.el (semanticdb-find-throttle-custom-list):
Fix value.

* lisp/gnus/gnus-salt.el (gnus-selected-tree-face): Fix default.

lisp/emacs-lisp/testcover.el

@@ -100,14 +100,14 @@ current global map.  The macro `lambda' is self-evaluating, hence always
 returns the same value (the function it defines may return varying values
 when called)."
   :group 'testcover
-  :type 'hook)
+  :type '(repeat symbol))
 
 (defcustom testcover-noreturn-functions
   '(error noreturn throw signal)
   "Subset of `testcover-1value-functions' -- these never return.  We mark
 them as having returned nil just before calling them."
   :group 'testcover
-  :type 'hook)
+  :type '(repeat symbol))
 
 (defcustom testcover-compose-functions
   '(+ - * / = append length list make-keymap make-sparse-keymap
@@ -132,7 +132,7 @@ brown splotch is shown for these if the last argument is a constant or a
 call to one of the `testcover-1value-functions'.  This list is probably
 incomplete!"
   :group 'testcover
-  :type 'hook)
+  :type '(repeat symbol))
 
 (defcustom testcover-prog1-functions
   '(prog1 unwind-protect)
@@ -140,7 +140,7 @@ incomplete!"
 brown splotch is shown for these if the first argument is a constant or a
 call to one of the `testcover-1value-functions'."
   :group 'testcover
-  :type 'hook)
+  :type '(repeat symbol))
 
 (defcustom testcover-potentially-1value-functions
   '(add-hook and beep or remove-hook unless when)