Correct some custom type typos

* lisp/image.el (image-use-external-converter):
* lisp/progmodes/sql.el (sql-use-indent-support):
* lisp/vc/add-log.el (add-log-dont-create-changelog-file): Fix
misspelled 'boolean custom type.

* lisp/progmodes/flymake-cc.el (flymake-cc-command): Correct custom
type specification.  (Bug#30990)

4 files changed, 5 insertions, 4 deletions

diff --git a/lisp/image.el b/lisp/image.el
index eaa6ed3b0ea..e44330fdfa9 100644
--- a/lisp/image.el
+++ b/lisp/image.el
@@ -148,7 +148,7 @@ and some others) internally, but images that don't have native
 support in Emacs can still be displayed if an external conversion
 program (like ImageMagick \"convert\", GraphicsMagick \"gm\"
 or \"ffmpeg\") is installed."
-  :type 'bool
+  :type 'boolean
   :version "27.1")
 
 ;; Map put into text properties on images.
diff --git a/lisp/progmodes/flymake-cc.el b/lisp/progmodes/flymake-cc.el
index ecf6e648a7e..f8c8eee26b2 100644
--- a/lisp/progmodes/flymake-cc.el
+++ b/lisp/progmodes/flymake-cc.el
@@ -37,7 +37,8 @@ syntax of a (Obj)C(++) program passed to it via its standard
 input and prints the result on its standard output."
   :type '(choice
           (symbol :tag "Function")
-          ((repeat :) string))
+          (repeat :tag "Command(s)" string))
+  :version "27.1"
   :group 'flymake-cc)
 
 (defun flymake-cc--make-diagnostics (source)
diff --git a/lisp/progmodes/sql.el b/lisp/progmodes/sql.el
index 2d33b3130cd..b17364b08f3 100644
--- a/lisp/progmodes/sql.el
+++ b/lisp/progmodes/sql.el
@@ -737,7 +737,7 @@ requirements.
 The package must be available to be loaded and activated."
   :group 'SQL
   :link '(url-link "https://elpa.gnu.org/packages/sql-indent.html")
-  :type 'booleanp
+  :type 'boolean
   :version "27.1")
 
 (defun sql-indent-enable ()
diff --git a/lisp/vc/add-log.el b/lisp/vc/add-log.el
index 47a68167fb7..5c27a65ea12 100644
--- a/lisp/vc/add-log.el
+++ b/lisp/vc/add-log.el
@@ -811,7 +811,7 @@ Optional arg BUFFER-FILE overrides `buffer-file-name'."
   "If non-nil, don't create ChangeLog files for log entries.
 If a ChangeLog file does not already exist, a non-nil value
 means to put log entries in a suitably named buffer."
-  :type :boolean
+  :type 'boolean
   :version "27.1")
 
 (put 'add-log-dont-create-changelog-file 'safe-local-variable 'booleanp)