+# AT_SAVE_SPECIAL_FILES / AT_RESTORE_SPECIAL_FILES
+# ------------------------------------------------
+# Don't interfere with caller's files.
+m4_divert_text([PREPARE_TESTS],
+[at_save_special_files ()
+{
+ for at_save_file in stderr experr expout
+ do
+ test ! -f $at_save_file || mv $at_save_file at-bison-check-$at_save_file.bak
+ done
+}
+
+at_restore_special_files ()
+{
+ for at_save_file in stderr experr expout
+ do
+ test ! -f at-bison-check-$at_save_file.bak ||
+ mv at-bison-check-$at_save_file.bak $at_save_file
+ done
+}
+])
+
+m4_define([AT_SAVE_SPECIAL_FILES], [at_save_special_files])
+m4_define([AT_RESTORE_SPECIAL_FILES], [at_restore_special_files])
+
+
+