org.el (org-babel-load-file): Load emacs-lisp and elisp src blocks

* lisp/org.el (org-babel-load-file): Load both "emacs-lisp"
and "elisp" source blocks.

* lisp/ob-tangle.el (org-babel-tangle-file)
(org-babel-tangle, org-babel-tangle-collect-blocks): Use a
regular expression to match the language(s) to tangle.

Thanks to Troy Hinckley for reporting this.

lisp/ob-tangle.el

@@ -166,13 +166,14 @@ evaluating BODY."
 (def-edebug-spec org-babel-with-temp-filebuffer (form body))
 
 ;;;###autoload
-(defun org-babel-tangle-file (file &optional target-file lang)
+(defun org-babel-tangle-file (file &optional target-file lang-re)
   "Extract the bodies of source code blocks in FILE.
 Source code blocks are extracted with `org-babel-tangle'.
 Optional argument TARGET-FILE can be used to specify a default
-export file for all source blocks.  Optional argument LANG can be
+export file for all source blocks.  Optional argument LANG-RE can
-used to limit the exported source code blocks by language.
+be used to limit the exported source code blocks by languages
-Return a list whose CAR is the tangled file name."
+matching a regular expression.  Return a list whose CAR is the
+tangled file name."
   (interactive "fFile to tangle: \nP")
   (let ((visited-p (find-buffer-visiting (expand-file-name file)))
 	to-be-removed)
@@ -180,7 +181,7 @@ Return a list whose CAR is the tangled file name."
 	(save-window-excursion
 	  (find-file file)
 	  (setq to-be-removed (current-buffer))
-	  (mapcar #'expand-file-name (org-babel-tangle nil target-file lang)))
+	  (mapcar #'expand-file-name (org-babel-tangle nil target-file lang-re)))
       (unless visited-p
 	(kill-buffer to-be-removed)))))
 
@@ -192,7 +193,7 @@ Return a list whose CAR is the tangled file name."
   (mapc (lambda (el) (copy-file el pub-dir t)) (org-babel-tangle-file filename)))
 
 ;;;###autoload
-(defun org-babel-tangle (&optional arg target-file lang)
+(defun org-babel-tangle (&optional arg target-file lang-re)
   "Write code blocks to source-specific files.
 Extract the bodies of all source code blocks from the current
 file into their own source-specific files.
@@ -200,8 +201,9 @@ With one universal prefix argument, only tangle the block at point.
 When two universal prefix arguments, only tangle blocks for the
 tangle file of the block at point.
 Optional argument TARGET-FILE can be used to specify a default
-export file for all source blocks.  Optional argument LANG can be
+export file for all source blocks.  Optional argument LANG-RE can
-used to limit the exported source code blocks by language."
+be used to limit the exported source code blocks by languages
+matching a regular expression."
   (interactive "P")
   (run-hooks 'org-babel-pre-tangle-hook)
   ;; Possibly Restrict the buffer to the current code block
@@ -286,7 +288,7 @@ used to limit the exported source code blocks by language."
 	      specs)))
 	 (if (equal arg '(4))
 	     (org-babel-tangle-single-block 1 t)
-	   (org-babel-tangle-collect-blocks lang tangle-file)))
+	   (org-babel-tangle-collect-blocks lang-re tangle-file)))
 	(message "Tangled %d code block%s from %s" block-counter
 		 (if (= block-counter 1) "" "s")
 		 (file-name-nondirectory
@@ -364,13 +366,14 @@ that the appropriate major-mode is set.  SPEC has the form:
 	       (org-fill-template
 		org-babel-tangle-comment-format-end link-data)))))
 
-(defun org-babel-tangle-collect-blocks (&optional language tangle-file)
+(defun org-babel-tangle-collect-blocks (&optional lang-re tangle-file)
   "Collect source blocks in the current Org file.
 Return an association list of source-code block specifications of
 the form used by `org-babel-spec-to-string' grouped by language.
-Optional argument LANGUAGE can be used to limit the collected
+Optional argument LANG-RE can be used to limit the collected
-source code blocks by language.  Optional argument TANGLE-FILE
+source code blocks by languages matching a regular expression.
-can be used to limit the collected code blocks by target file."
+Optional argument TANGLE-FILE can be used to limit the collected
+code blocks by target file."
   (let ((counter 0) last-heading-pos blocks)
     (org-babel-map-src-blocks (buffer-file-name)
       (let ((current-heading-pos
@@ -385,7 +388,7 @@ can be used to limit the collected code blocks by target file."
 	       (src-tfile (cdr (assq :tangle (nth 2 info)))))
 	  (unless (or (string= src-tfile "no")
 		      (and tangle-file (not (equal tangle-file src-tfile)))
-		      (and language (not (string= language src-lang))))
+		      (and lang-re (not (string-match-p lang-re src-lang))))
 	    ;; Add the spec for this block to blocks under its
 	    ;; language.
 	    (let ((by-lang (assoc src-lang blocks))

lisp/org.el

@@ -224,7 +224,7 @@ byte-compiled before it is loaded."
     (unless (org-file-newer-than-p
 	     tangled-file
 	     (file-attribute-modification-time (file-attributes file)))
-      (org-babel-tangle-file file tangled-file "emacs-lisp"))
+      (org-babel-tangle-file file tangled-file "emacs-lisp\\|elisp"))
     (if compile
 	(progn
 	  (byte-compile-file tangled-file 'load)