log_min_messages shows debug instead of debug2

When Who What
2018-07-06 11:36:03 Andrew Dunstan (adunstan) Closed in commitfest 2018-07 with status: Committed
2018-07-06 11:35:38 Andrew Dunstan (adunstan) Added adunstan as committer
2018-07-01 12:19:21 Peter Eisentraut (petere) Changed committer to rhaas
2018-05-18 00:07:35 Takeshi Ideriha (ideriha) New status: Ready for Committer
2018-05-18 00:07:28 Takeshi Ideriha (ideriha) Changed authors to Takeshi Ideriha (ideriha)
2018-05-18 00:07:05 Takeshi Ideriha (ideriha) Attached mail thread 4E72940DA2BF16479384A86D54D0988A5678EC03@G01JPEXMBKW04
2018-05-18 00:07:05 Takeshi Ideriha (ideriha) Created patch record