still more miscellaneous comment fixes

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4034 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/files.c

@@ -2050,7 +2050,7 @@ void free_chararray(char **array, size_t len)
 #endif
 
 #ifndef DISABLE_TABCOMP
-/* Is the given file a directory? */
+/* Is the given path a directory? */
 bool is_dir(const char *buf)
 {
     char *dirptr;