Drop superfluous braces

Author: odersky

src/dotty/tools/dotc/typer/Typer.scala

@@ -1462,14 +1462,15 @@ class Typer extends Namer with TypeAssigner with Applications with Implicits wit
         val arity =
           if (defn.isFunctionType(pt))
             if (!isFullyDefined(pt, ForceDegree.none) && isFullyDefined(wtp, ForceDegree.none))
-              // prioritize method parameter types over expected types as parameter types of the eta-expanded closure
+              // if method type is fully defined, but expected type is not,
+              // prioritize method parameter types as parameter types of the eta-expanded closure
               0
             else defn.functionArity(pt)
           else if (pt eq AnyFunctionProto) wtp.paramTypes.length
           else -1
-        if (arity >= 0 && !tree.symbol.isConstructor) {
+        if (arity >= 0 && !tree.symbol.isConstructor)
           typed(etaExpand(tree, wtp, arity), pt)
-        } else if (wtp.paramTypes.isEmpty)
+        else if (wtp.paramTypes.isEmpty)
           adaptInterpolated(tpd.Apply(tree, Nil), pt, EmptyTree)
         else if (wtp.isImplicit)
           err.typeMismatch(tree, pt)