Wiki page Watch notification subject has gained a newline prefix in 18.6

• Regression

We've just done a sucessful in situ upgrade from TW18.5 to TW18.6.

Post upgrade, Watch notification e-mails seem to have a gained a newline prefix to the message subject.
This is also evident in the TW log file where the receiving user and the subject are now on separate lines.

Taken from the source of the received e-mail...
pre upgrade Subject: wiki page "17821020_DB_1A_pp_87-88" changed by user-real-name
post upgrade Subject: =?UTF-8?Q?=0Awiki=20page=20?= =?UTF-8?Q?"18360215=5FAccounting=5Fof=5FEstate=5Fof=5FJohn=5FReaves"=20?= =?UTF-8?Q?changed=20by=20user-real-name?=

This is only affecting Watch notification emails. Email associated with notifications from the wiki's internal Message system are unaffected. That makes me think its not a generic system/sendmail subsystem issue.

Did 18.6 introduce a new configuration option I've yet to find?

I don't think I can easily demonstrate this on the "show" system since mail isn't enabled there, but I will add a couple of screen shots showing the issue in our log files.

Thanks,
M

Update #1 - I've done the best I'm able with the show instance. I've enabled both Watches and the internal Message system. I added a wiki page and the watch notification (log ID 7) shows the subject on a separate line to the receiving user. I created a new user and sent that user a message. Log ID 10 shows that receiving user and the message subject on the same line. Screen snip attached.

I've also attached two screen snips from our system showing the log entries for a Watch notification from just before and just after the TW18.5 to TW18.6 upgrade.

I can also confirm that Tracker notification e-mails are NOT affected by the addition of this newline prefix to the subject line since the upgrade.

1. TW18 5 Syslog 271867 Snip Redact
2. TW18 6 Syslog 271901 Snip Redact
3. TW18 6 Show 7423 Snip Redact

This bug has been demonstrated on show2.tiki.org

Please demonstrate your bug on show2.tiki.org

This bug has been demonstrated on show.tikiwiki.org

Please demonstrate your bug on show.tikiwiki.org