Multiple console warning messages from Utils.cc printed on same line

[scpeters]

Environment

• OS Version: Ubuntu 20.04
• Source or binary build? source build of sdf13 as of 7f63d02

Description

• Expected behavior: one console message should be printed per line
• Actual behavior: several messages from Utils.cc can be printed on a single line

For example from UNIT_Geometry_TEST in the following jenkins console output:

• https://build.osrfoundation.org/view/ign-garden/job/sdformat-ci-sdformat13-focal-amd64/78/consoleText

41: �[1;31mError [Utils.cc:174]�[0m Empty string used when setting a required parameter. Key[uri]�[1;31mError [Utils.cc:174]�[0m Empty string used when setting a required parameter. Key[uri][       OK ] DOMGeometry.ToElement (4 ms)

Steps to reproduce

1. Search for [Utils.cc in https://build.osrfoundation.org/view/ign-garden/job/sdformat-ci-sdformat13-focal-amd64/78/consoleText

Output

[scpeters]

I believe many of these messages come from enforceConfigurablePolicyCondition in Utils.cc which prints many console messages without a trailing '\n'. There are some sdf::Error objects that have a trailing newline character in their message, but the majority do not.