message: Fix shell test after error message change
diff: @@ -77,7 +77,7 @@ test('''
  CREATE TABLE a (i STRING);
  INSERT INTO a VALUES ('XXXX');
  SELECT CAST(i AS INTEGER) FROM a;
  -''' , err='Could not convert')
  +''' , err='can\'t be cast')
  test('.auth ON', err='sqlite3_set_authorizer')
  test('.auth OFF', err='sqlite3_set_authorizer')
  @@ -164,7 +164,7 @@ test('.load %s' % tf(), err="Error")
  # error in streaming result
  test('''
  SELECT x::INT FROM (SELECT x::VARCHAR x FROM range(10) tbl(x) UNION ALL SELECT 'hello' x) tbl(x);
  -''', err='Could not convert string')
  +''', err='can\'t be cast')
  # this should be fixed
  test('.selftest', err='sqlite3_table_column_metadata')
  