Fix spelling mistakes in //docs.

docs/emacs.md

 # Emacs
 
 [TOC]
 
 ## Debugging
 
 [Linux Debugging](linux_debugging.md) has some emacs-specific debugging tips.
 
 
 ## Blink Style (WebKit)
@@ skipping 43 matching lines @@
 may not yet be complete, but it covers the most common differences.
 
 Now that you have a WebKit specific style being applied, and assuming you have
 font locking and it's default jit locking turned on, you can also get Emacs 23
 to wrap long lines more intelligently by adding the following to your .emacs
 file:
 
 ```el
 ;; For dealing with WebKit long lines and word wrapping.
 (defun c-mode-adaptive-indent (beg end)
-  "Set the wrap-prefix for the the region between BEG and END with adaptive filling."
+  "Set the wrap-prefix for the region between BEG and END with adaptive filling."
   (goto-char beg)
   (while
       (let ((lbp (line-beginning-position))
             (lep (line-end-position)))
         (put-text-property lbp lep 'wrap-prefix (concat (fill-context-prefix lbp lep) (make-string c-basic-offset ? )))
         (search-forward "\n" end t))))
 
 (define-minor-mode c-adaptive-wrap-mode
   "Wrap the buffer text with adaptive filling for c-mode."
   :lighter ""
@@ skipping 303 matching lines @@
 *   `trybot.el`: import Windows trybot output into a `compilation-mode` buffer.
 
 ## ERC for IRC
 
 See [ErcIrc](erc_irc.md).
 
 ## TODO
 
 *   Figure out how to make `M-x compile` default to
     `cd /path/to/chrome/root; make -r chrome`.