(defcustom lisp-indent-backquote-substitution-mode t
"How to indent substitutions in backquotes.
-If `t', the default, indent substituted forms normally.
-If `nil', do not apply special indentation rule to substituted
+If t, the default, indent substituted forms normally.
+If nil, do not apply special indentation rule to substituted
forms. If `corrected', subtract the `,' or `,@' from the form
column, indenting as if this character sequence were not present.
In any case, do not backtrack beyond a backquote substitution.
-Until Emacs 25.1, the `nil' behavior was hard-wired."
+Until Emacs 25.1, the nil behavior was hard-wired."
:version "25.1"
:type '(choice (const corrected) (const nil) (const t))
:group 'lisp-indent)