to be perfectly aligned with bug report, explicitly setting the alter statement

Shlomi Noach · Shlomi Noach · commit 3ad51b30cde9 · 2018-01-28T09:14:10.000+02:00
diff --git a/localtests/datetime-1970/extra_args b/localtests/datetime-1970/extra_args
@@ -0,0 +1 @@
+--alter='add column name varchar(1)'
