isearch.el (isearch-process-search-char): Add docstring.

lisp/ChangeLog

+2015-01-27  Artur Malabarba  <bruce.connor.am@gmail.com>
+
+	* isearch.el (isearch-process-search-char): Add docstring.
+
 2015-01-27  Oleh Krehel  <ohwoeowho@gmail.com>
 
 	* emacs-lisp/derived.el (define-derived-mode): Declare indent 3.

lisp/isearch.el

@@ -2349,6 +2349,8 @@ With argument, add COUNT copies of the character."
       (isearch-process-search-char char count))))
 
 (defun isearch-process-search-char (char &optional count)
+  "Add CHAR to the search string, COUNT times.
+Search is updated accordingly."
   ;; * and ? are special in regexps when not preceded by \.
   ;; } and | are special in regexps when preceded by \.
   ;; Nothing special for + because it matches at least once.