Can't round trip dolt dump

[andy-wm-arthur]

import doltdump.sql from this database: https://www.dolthub.com/repositories/dolthub/first-hour-db

throws an error trying to parse a literal:

Error parsing SQL
syntax error at position 185 near ''

ate`) VALUES (1,'47 MySakila Drive',NULL,'Alberta',300,'','',>
                                                                ^
syntax error at position 185 near ''

[timsehn]

Related: #3729