* lisp/ob.el: Avoid spurious matches to literal

"#+end_src" inside a source block.

Added newline to org-babel-src-block-regexp.

lisp/ob.el

@@ -141,7 +141,7 @@ remove code block execution from the C-c C-c keybinding."
    ;; (4) header arguments
    "\\([^\n]*\\)\n"
    ;; (5) body
-   "\\([^\000]*?\n*\\)[ \t]*#\\+end_src")
+   "\\([^\000]*?\n*\\)\n[ \t]*#\\+end_src")
   "Regexp used to identify code blocks.")
 
 (defvar org-babel-inline-src-block-regexp