Werk #7433: mail: make the long output of HTML mails more readable

Component	Notifications
Title	mail: make the long output of HTML mails more readable
Date	Jul 2, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0b3 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.5.0p20 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The mail script now replaces '\n' in the long output by '<br>' so that every line of the long output is now a separate line in the HTML output as well.

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