Merge pull request #2018 from tdudzik/fix-condition-in-scala3-book

Fix if condition in Scala3 book

Author: smarter

_overviews/scala3-book/taste-control-structures.md

@@ -27,7 +27,7 @@ Scala’s `if`/`else` control structure looks similar to other languages:
 ```scala
 if x < 0 then
   println("negative")
-else if x == 0
+else if x == 0 then
   println("zero")
 else
   println("positive")