+# Filter out "From " lines because their timestamps can differ by a second.
+grep -v '^From ' "${MH_TEST_DIR}/Mail/mbox" >"${MH_TEST_DIR}/Mail/mbox-filt"
+grep -v '^From ' "${MH_TEST_DIR}/Mail/mbox2" >"${MH_TEST_DIR}/Mail/mbox2-filt"
+check "${MH_TEST_DIR}/Mail/mbox-filt" "${MH_TEST_DIR}/Mail/mbox2-filt"