Tests on Windows fail with: "InvalidPathException: Illegal char <:> at index 2: /C:/Users/..."

[jpsacha]

Constructor of SciJavaScriptEngine fails on Windows creating ReplDriver. The classPath has extra "/" at the beginning resulting in error:

ava.nio.file.InvalidPathException: Illegal char <:> at index 2: /C:/Users/...jar

	at sun.nio.fs.WindowsPathParser.normalize(WindowsPathParser.java:182)
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:153)
	at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
	at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94)
	at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255)
	at java.nio.file.Paths.get(Paths.java:84)
	at dotty.tools.dotc.core.MacroClassLoader$.$anonfun$1(MacroClassLoader.scala:25)
	at scala.collection.immutable.List.map(List.scala:246)
	at dotty.tools.dotc.core.MacroClassLoader$.makeMacroClassLoader(MacroClassLoader.scala:25)
	at dotty.tools.dotc.core.MacroClassLoader$.init(MacroClassLoader.scala:19)
	at dotty.tools.dotc.Driver.setup(Driver.scala:77)
	at dotty.tools.repl.ReplDriver.setupRootCtx(ReplDriver.scala:88)
	at dotty.tools.repl.ReplDriver.initialCtx(ReplDriver.scala:84)
	at dotty.tools.repl.ReplDriver.resetToInitial(ReplDriver.scala:110)
	at dotty.tools.repl.ReplDriver.<init>(ReplDriver.scala:125)
	at dotty.tools.repl.SciJavaScriptEngine.<init>(SciJavaScriptEngine.scala:37)
	at dotty.tools.repl.SciJavaScriptEngine$Factory.getScriptEngine(SciJavaScriptEngine.scala:102)
	at org.scijava.plugins.scripting.scala.ScalaAdaptedScriptEngineFactory.getScriptEngine(ScalaAdaptedScriptEngineFactory.scala:55)
	at org.scijava.plugins.scripting.scala.ScalaAdaptedScriptEngineFactory.getScriptEngine(ScalaAdaptedScriptEngineFactory.scala:55)
	at org.scijava.script.AdaptedScriptLanguage.getScriptEngine(AdaptedScriptLanguage.java:138)
	at org.scijava.plugins.scripting.scala.ScalaTest.issue9(ScalaTest.java:340)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	...