bug#29417: 26.0.90: minor modes enabled after C-h f

[Glenn Morris]

Version: 26.0.91

commit e9ea206 (HEAD, origin/emacs-26, emacs-26)
Date:   Sun Dec 3 18:54:08 2017 -0800

    Don't enable erc modules on simply loading erc.el
    
    * lisp/erc/erc.el (erc-modules): Use default :initialize.  (Bug#29417)

diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index 5fe4f9a..d75209a 100644
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -1832,6 +1832,7 @@ erc-modules
   :get (lambda (sym)
          ;; replace outdated names with their newer equivalents
          (erc-migrate-modules (symbol-value sym)))
+  :initialize 'custom-initialize-default
   :set (lambda (sym val)
          ;; disable modules which have just been removed
          (when (and (boundp 'erc-modules) erc-modules val)