reflection API requires one to mangle symbolic names

[scabug]

scala> class C { def +(c: C) = ??? }
defined class C

scala> typeOf[C].member(newTermName("+"))
res0 @ 5b4b6ec8: reflect.runtime.universe.Symbol = <none>

This might be the status quo among the dev team, but it doesn't have to be so for everyone else.

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-6180?orig=1
Reporter: @xeno-by

[scabug]

@xeno-by said:
If we decide to fix this, we should also fix ScalaReflectionException error messages that currently print mangled names

[scabug]

@xeno-by said:
(after a reflection meeting) There doesn't seem to be a clearly winning solution here, so we're deferring the fix to 2.10.x.

[SethTisue]

further changes in this area are unlikely