org-src: Fix docstrings

* lisp/org-src.el (org-src-mode-hook):
(org-src-mode): Fix docstring.
(org-src-mode-map): Refactor.

lisp/org-src.el

@@ -156,10 +156,10 @@ other-frame       Use `switch-to-buffer-other-frame' to display edit buffer.
 
 (defvar org-src-mode-hook nil
   "Hook  run after Org switched a source code snippet to its Emacs mode.
-This hook will run
-
-- when editing a source code snippet with \"C-c '\".
-- When formatting a source code snippet for export with htmlize.
+\\<org-mode-map>
+This hook will run:
+- when editing a source code snippet with \\[org-edit-special]
+- when formatting a source code snippet for export with htmlize.
 
 You may want to use this hook for example to turn off `outline-minor-mode'
 or similar things which you want to have when editing a source code file,
@@ -527,18 +527,23 @@ with \",*\", \",#+\", \",,*\" and \",,#+\"."
 
 ;;; Org src minor mode
 
-(defvar org-src-mode-map (make-sparse-keymap))
-(define-key org-src-mode-map "\C-c'" 'org-edit-src-exit)
-(define-key org-src-mode-map "\C-c\C-k" 'org-edit-src-abort)
-(define-key org-src-mode-map "\C-x\C-s" 'org-edit-src-save)
+(defvar org-src-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map "\C-c'" 'org-edit-src-exit)
+    (define-key map "\C-c\C-k" 'org-edit-src-abort)
+    (define-key map "\C-x\C-s" 'org-edit-src-save)
+    map))
 
 (define-minor-mode org-src-mode
   "Minor mode for language major mode buffers generated by org.
+\\<org-mode-map>
 This minor mode is turned on in two situations:
-- when editing a source code snippet with \"C-c '\".
-- When formatting a source code snippet for export with htmlize.
-There is a mode hook, and keybindings for `org-edit-src-exit' and
-`org-edit-src-save'"
+  - when editing a source code snippet with \\[org-edit-special]
+  - when formatting a source code snippet for export with htmlize.
+
+\\{org-src-mode-map}
+
+See also `org-src-mode-hook'."
   (when org-edit-src-persistent-message
     (org-set-local
      'header-line-format