• I've read the CONTRIBUTING guidelines

steps

scala> sbt.internal.util.ConsoleLogger().info(s"\t")
[info] \t

scala> sbt.internal.util.ConsoleLogger().info(s"\t${"wtf"}")
[info]  wtf

scala> sbt.internal.util.ConsoleLogger().info("\tfoo")
[info]  foo

problem

s"" should be simplified to "" at runtime, but the sbt logger somehow escapes the contents additionally.

expectation

s"" should behave like a regular string w.r.t. escaping.
See

scala> s"\t"
res8: String = "        "

notes

sbt version:
1.0 works fine
1.2.1 has this issue
1.2.3 has this issue