Remove incorrect indent in structural-types.md

Author: Sporarum

docs/_docs/reference/changed-features/structural-types.md

@@ -84,7 +84,7 @@ a database layer, and therefore would not be a concern of the end user.
 Besides `selectDynamic`, a `Selectable` class sometimes also defines a method `applyDynamic`. This can then be used to translate function calls of structural members. So, if `a` is an instance of `Selectable`, a structural call like `a.f(b, c)` would translate to
 
 ```scala
-  a.applyDynamic("f")(b, c)
+a.applyDynamic("f")(b, c)
 ```
 
 ## Using Java Reflection