fix Scala version number handling for 2.13 community build

SethTisue · SethTisue · commit 306958188d9c · 2018-01-23T18:09:04.000-08:00
we need to handle a Scala version like `2.13.0-pre-5e84129`,
as we see in nightly builds before bincompat is locked down
diff --git a/src/test/scala/scala/async/package.scala b/src/test/scala/scala/async/package.scala
@@ -64,7 +64,7 @@ package object async {
   }
 
   def scalaBinaryVersion: String = {
-    val PreReleasePattern = """.*-(M|RC).*""".r
+    val PreReleasePattern = """.*-(M|RC|pre-).*""".r
     val Pattern = """(\d+\.\d+)\..*""".r
     val SnapshotPattern = """(\d+\.\d+\.\d+)-\d+-\d+-.*""".r
     scala.util.Properties.versionNumberString match {

Original file line number	Diff line number	Diff line change
`@@ -64,7 +64,7 @@ package object async {`
`64`	`64`	`}`
`65`	`65`
`66`	`66`	`def scalaBinaryVersion: String = {`
`67`		`- val PreReleasePattern = """.-(M\|RC).""".r`
	`67`	`+ val PreReleasePattern = """.-(M\|RC\|pre-).""".r`
`68`	`68`	`val Pattern = """(\d+\.\d+)\..*""".r`
`69`	`69`	`val SnapshotPattern = """(\d+\.\d+\.\d+)-\d+-\d+-.*""".r`
`70`	`70`	`scala.util.Properties.versionNumberString match {`