Merge pull request #48 from retronym/topic/2.13-compat

Tiny change to scalap corpus to compile under -Xsource:2.13

Author: retronym

corpus/scalap/a8c43dc/scalax/rules/scalasig/ScalaSigPrinter.scala

@@ -59,7 +59,7 @@ class ScalaSigPrinter(stream: PrintStream, printPrivates: Boolean) {
           indent
           printClass(level, c)
         case m: MethodSymbol =>
-          printMethod(level, m, indent)
+          printMethod(level, m, () => indent())
         case a: AliasSymbol =>
           indent
           printAlias(level, a)