stdlib tests: coding style fixes

Author: gribozavr

validation-test/stdlib/Slice.swift.gyb

@@ -16,29 +16,28 @@ import StdlibCollectionUnittest
 
 /// Reference-type collection for testing the `base` property.
 class ReferenceCollection : RandomAccessCollection {
-    typealias Index = Int
-    
-    var startIndex: Int {
-        return 0
-    }
-    
-    var endIndex: Int {
-        return 1
-    }
-
-    subscript(index: Int) -> String {
-        return ""
-    }
-    
-    func index(after i: Int) -> Int {
-        return 1
-    }
-    
-    func index(before i: Int) -> Int {
-        return 0
-    }
-}
+  typealias Index = Int
+
+  var startIndex: Int {
+    return 0
+  }
 
+  var endIndex: Int {
+    return 1
+  }
+
+  subscript(index: Int) -> String {
+    return ""
+  }
+
+  func index(after i: Int) -> Int {
+    return 1
+  }
+
+  func index(before i: Int) -> Int {
+    return 0
+  }
+}
 
 var SliceTests = TestSuite("Collection")