still more comment fixes

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3992 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/text.c

@@ -63,7 +63,7 @@ void do_mark(void)
 }
 #endif /* !NANO_TINY */
 
-/* Delete one character. */
+/* Delete the character under the cursor. */
 void do_delete(void)
 {
     bool do_refresh = FALSE;