* net/browse-url.el (browse-url-encode-url): Don't escape commas.

They are valid characters in URL paths (rfc3986), and at least
Firefox does not understand the encoded version (Bug#3166).

lisp/ChangeLog

+2010-01-02  Chong Yidong  <cyd@stupidchicken.com>
+
+	* net/browse-url.el (browse-url-encode-url): Don't escape commas.
+	They are valid characters in URL paths (rfc3986), and at least
+	Firefox does not understand the encoded version (Bug#3166).
+
 2010-01-02  Daniel Elliott  <danelliottster@gmail.com>  (tiny change)
 
 	* progmodes/octave-mod.el (octave-end-keywords)

lisp/net/browse-url.el

@@ -613,7 +613,7 @@ down (this *won't* always work)."
 
 (defun browse-url-url-encode-chars (text chars)
   "URL-encode the chars in TEXT that match CHARS.
-CHARS is a regexp-like character alternative (e.g., \"[,)$]\")."
+CHARS is a regexp-like character alternative (e.g., \"[)$]\")."
   (let ((encoded-text (copy-sequence text))
 	(s 0))
     (while (setq s (string-match chars encoded-text s))
@@ -626,10 +626,12 @@ CHARS is a regexp-like character alternative (e.g., \"[,)$]\")."
 
 (defun browse-url-encode-url (url)
   "Escape annoying characters in URL.
-The annoying characters are those that can mislead a webbrowser
-regarding its parameter treatment.  For instance, `,' can
-be misleading because it could be used to separate URLs."
-  (browse-url-url-encode-chars url "[,)$]"))
+The annoying characters are those that can mislead a web browser
+regarding its parameter treatment."
+  ;; FIXME: Is there an actual example of a web browser getting
+  ;; confused?  (This used to encode commas, but at least Firefox
+  ;; handles commas correctly and doesn't accept encoded commas.)
+  (browse-url-url-encode-chars url "[)$]"))
 
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