explain that M1 = milestone 1

SethTisue · SethTisue · commit 8edf90a6ff01 · 2017-04-18T13:24:46.000-05:00
diff --git a/news/_posts/2017-04-18-releases-1Q17.md b/news/_posts/2017-04-18-releases-1Q17.md
@@ -19,4 +19,4 @@ For the highlights of these three releases, read on.
 
 [Scala 2.12.2](https://github.com/scala/scala/releases/tag/v2.12.2) adds support for trailing commas, the first proposal ([SIP-27](http://docs.scala-lang.org/sips/completed/trailing-commas.html)) to make it all the way through the revived Scala Improvement Process. Congratulations, @dwijnand!
 
-[Scala 2.13.0-M1](https://github.com/scala/scala/releases/tag/v2.13.0-M1) prepares for the next phase of the standard library [modularization](https://github.com/scala/scala-dev/issues/323) and the [collections rework](https://github.com/scala/collection-strawman). The parallel collections are now a separate [module](https://github.com/scala/scala-parallel-collections), and many deprecated members have been removed. As a reminder, our [full 2.13 roadmap](https://github.com/scala/scala-dev/issues/324) is available for review on GitHub.
+[Scala 2.13.0-M1](https://github.com/scala/scala/releases/tag/v2.13.0-M1) (milestone 1) prepares for the next phase of the standard library [modularization](https://github.com/scala/scala-dev/issues/323) and the [collections rework](https://github.com/scala/collection-strawman). The parallel collections are now a separate [module](https://github.com/scala/scala-parallel-collections), and many deprecated members have been removed. As a reminder, our [full 2.13 roadmap](https://github.com/scala/scala-dev/issues/324) is available for review on GitHub.

Original file line number	Diff line number	Diff line change
`@@ -19,4 +19,4 @@ For the highlights of these three releases, read on.`
`19`	`19`
`20`	`20`	`[Scala 2.12.2](https://github.com/scala/scala/releases/tag/v2.12.2) adds support for trailing commas, the first proposal ([SIP-27](http://docs.scala-lang.org/sips/completed/trailing-commas.html)) to make it all the way through the revived Scala Improvement Process. Congratulations, @dwijnand!`
`21`	`21`
`22`		-[Scala 2.13.0-M1](https://github.com/scala/scala/releases/tag/v2.13.0-M1) prepares for the next phase of the standard library [modularization](https://github.com/scala/scala-dev/issues/323) and the [collections rework](https://github.com/scala/collection-strawman). The parallel collections are now a separate [module](https://github.com/scala/scala-parallel-collections), and many deprecated members have been removed. As a reminder, our [full 2.13 roadmap](https://github.com/scala/scala-dev/issues/324) is available for review on GitHub.
	`22`	+[Scala 2.13.0-M1](https://github.com/scala/scala/releases/tag/v2.13.0-M1) (milestone 1) prepares for the next phase of the standard library [modularization](https://github.com/scala/scala-dev/issues/323) and the [collections rework](https://github.com/scala/collection-strawman). The parallel collections are now a separate [module](https://github.com/scala/scala-parallel-collections), and many deprecated members have been removed. As a reminder, our [full 2.13 roadmap](https://github.com/scala/scala-dev/issues/324) is available for review on GitHub.