Fix #5971: Update Scala 2 macros doc

Author: nicolasstucki

docs/docs/reference/dropped-features/macros.md

@@ -1,13 +1,12 @@
 ---
 layout: doc-page
-title: Dropped: Macros
+title: Dropped: Scala 2 Macros
 ---
 
 The previous, experimental macro system has been dropped. Instead,
 there is a cleaner, more restricted system based on two complementary
-concepts: `inline` and `meta`.
-
-`inline` has been [implemented](../other-new-features/inline.md) in Dotty.
-
-`meta` is worked on in the separate [Scalameta](http://scalameta.org) project
+concepts: `inline` and `'{ ... }`/`${ ... }` code generation.
 
+* `inline` has been [implemented](../other-new-features/inline.md) in Dotty.
+* Quotes `'{ ... }` and splices `${ ... }` has been [implemented](../other-new-features/principled-meta-programming.md) in Dotty.
+  * [TASTy reflect](../other-new-features/tasty-reflect.md) provides more complex tree based APIs to inspect or create quoted code.