ob-clojure-literate: Don't enable ob-clojure-literate-mode by default.

* contrib/lisp/ob-clojure-literate.el (ob-clojure-literate-auto-jackin):
Handle the case that detect cider-jack-in is executed but not connected,
and ob-clojure-literate-mode is enabled already.

* contrib/lisp/ob-clojure-literate.el (ob-clojure-literate-mode): Don't
  enable ob-clojure-literate-mode by default.

contrib/lisp/ob-clojure-literate.el

@@ -67,6 +67,7 @@ If it is a directory, `ob-clojure-literate' will try to create Clojure project a
 	  ;; get global value instead of buffer local.
 	  (default-value 'cider-connections)))
 
+;;; Do not allow "ob-clojure" project session name.
 (defun ob-clojure-literate-set-session ()
   "Set session name for buffer local."
   ;; if default session is the only one in connections list.
@@ -80,8 +81,8 @@ If it is a directory, `ob-clojure-literate' will try to create Clojure project a
                                      (ob-clojure-literate-get-session-list)))
       ;; if none, set to default session name to fix `ob-clojure-literate-mode'
       ;; is enabled before `cider-jack-in' generated connections.
-      (setq-local ob-clojure-literate-session ob-clojure-literate-default-session))
-    ))
+      (setq-local ob-clojure-literate-session
+		  ob-clojure-literate-default-session))))
 
 ;;;###autoload
 (defun ob-clojure-literate-specify-session ()
@@ -124,15 +125,14 @@ If it is a directory, `ob-clojure-literate' will try to create Clojure project a
                   (if (not (null ob-clojure-literate-session))
 		      (seq-contains cider-connections (get-buffer ob-clojure-literate-session))))
              cider-connections
-             (not (null ob-clojure-literate-session)))
+	     (ob-clojure-literate-any-connection-p))
       ;; return back to original file.
       (if (not (and (= (length (ob-clojure-literate-get-session-list)) 1)
                     (member ob-clojure-literate-default-session (ob-clojure-literate-get-session-list))))
           (save-window-excursion
             (find-file (expand-file-name (concat ob-clojure-literate-project-location "ob-clojure/src/ob_clojure/core.clj")))
             (with-current-buffer "core.clj"
-	      (cider-jack-in))))))
-   ))
+	      (cider-jack-in))))))))
 
 (defun ob-clojure-literate-set-local-cider-connections (toggle?)
   "Set buffer local `cider-connections' for `ob-clojure-literate-mode' `TOGGLE?'."
@@ -182,8 +182,7 @@ If it is a directory, `ob-clojure-literate' will try to create Clojure project a
           (delq t
                 (mapcar
                  (lambda (cons) (if (eq (car cons) :session) t cons))
-                 org-babel-default-header-args:clojure)))
-    ))
+                 org-babel-default-header-args:clojure)))))
 
 ;;; Support `org-babel-initiate-session' / [C-c C-v z] to initialize Clojure session.
 
@@ -334,7 +333,7 @@ reset `RESULT' to `nil'."
 (define-minor-mode ob-clojure-literate-mode
   "A minor mode to toggle `ob-clojure-literate'."
   :require 'ob-clojure-literate
-  :init-value t
+  :init-value nil
   :lighter " clj-lp"
   :group 'ob-clojure-literate
   :keymap ob-clojure-literate-mode-map