Update faq.md

Use scala comments //

docs/src/main/tut/faq.md

@@ -268,7 +268,7 @@ Of course. [sbt-catalysts](https://github.com/typelevel/sbt-catalysts) is create
 
 The easiest way is probably using [Ammonite-REPL](http://ammonite.io/). Install it following the instructions there. Then in the amm console you can type in
 ```scala
-# interp.configureCompiler(_.settings.YpartialUnification.value = true) # If using scala 2.11 or 2.12
+// interp.configureCompiler(_.settings.YpartialUnification.value = true) // If using scala 2.11 or 2.12
 import $ivy.`org.typelevel::cats-core:2.1.1`, cats._, cats.data._, cats.implicits._
 ```
 Or if you want, you can add these lines to `~/.ammonite/predef.sc` so that they are enabled every ammonite session.