Eval generates broke classpath when current classpath includes filename with spaces

[stephenjudkins]

To reproduce:

• Create an SBT project in a directory that includes an escaped space (%20).
• Evaluate Scala source code that includes a reference to class in your current classpath.
• Observe failure:

com.twitter.util.Eval$CompilerException: Compiler exception error: line 2: object turing is not a member of package com
import com.turing.madea.MadeaConfig
           ^
    at com.twitter.util.Eval$StringCompiler.apply(Eval.scala:529)
    at com.twitter.util.Eval$StringCompiler$$anonfun$apply$3.apply(Eval.scala:540)
    at com.twitter.util.Eval$StringCompiler$$anonfun$apply$3.apply(Eval.scala:539)
    at scala.Option.getOrElse(Option.scala:108)
    at com.twitter.util.Eval$StringCompiler.apply(Eval.scala:539)
    at com.twitter.util.Eval.applyProcessed(Eval.scala:198)
    at com.twitter.util.Eval.applyProcessed(Eval.scala:191)
    at com.twitter.util.Eval.apply(Eval.scala:137)

[mariusae]

Merged (manually)