add missing comments

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3697 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

 CVS code -
 - General:
+	- Miscellaneous comment fixes. (DLR)
 	- Fix option descriptions.  At least one of the two parts of
 	  +LINE,COLUMN must be specified at all times; COLUMN is not the
 	  only optional value.  Also fix a wording problem in

src/browser.c

@@ -912,11 +912,13 @@ void do_fileresearch(void)
     filesearch_abort();
 }
 
+/* Select the first file in the list. */
 void do_first_file(void)
 {
     selected = 0;
 }
 
+/* Select the last file in the list. */
 void do_last_file(void)
 {
     selected = filelist_len - 1;