Style fixes

Author: beccadax

benchmark/single-source/StringInterpolation.swift

@@ -25,13 +25,13 @@ public let StringInterpolationManySmallSegments = BenchmarkInfo(
   runFunction: run_StringInterpolationManySmallSegments,
   tags: [.validation, .api, .String])
 public let CustomStringInterpolation = BenchmarkInfo(
-	name: "CustomStringInterpolation",
-	runFunction: run_CustomStringInterpolation,
-	tags: [.validation, .api, .String])
+  name: "CustomStringInterpolation",
+  runFunction: run_CustomStringInterpolation,
+  tags: [.validation, .api, .String])
 public let CustomStringNoInterpolation = BenchmarkInfo(
-	name: "CustomStringNoInterpolation",
-	runFunction: run_CustomStringNoInterpolation,
-	tags: [.validation, .api, .String])
+  name: "CustomStringNoInterpolation",
+  runFunction: run_CustomStringNoInterpolation,
+  tags: [.validation, .api, .String])
 
 class RefTypePrintable : CustomStringConvertible {
   var description: String {
@@ -40,11 +40,11 @@ class RefTypePrintable : CustomStringConvertible {
 }
 
 struct CustomString: ExpressibleByStringInterpolation {
-	var value: String
-	
-	init(stringLiteral: String) {
-		self.value = stringLiteral
-	}
+  var value: String
+
+  init(stringLiteral: String) {
+    self.value = stringLiteral
+  }
 }
 
 @inline(never)

stdlib/public/core/StringGuts.swift

@@ -985,7 +985,7 @@ extension _StringGuts {
   mutating func append<S: StringProtocol>(_ other: S) {
     self.append(other._wholeString._guts, range: other._encodedOffsetRange)
   }
-  
+
   @inlinable // @testable
   internal
   mutating func append(_ other: _StringGuts) {

stdlib/public/core/StringInterpolation.swift

@@ -105,7 +105,9 @@ public struct DefaultStringInterpolation: StringInterpolationProtocol {
   ///     print(message)
   ///     // Prints "If one cookie costs 2 dollars, 3 cookies cost 6 dollars."
   @inlinable
-  public mutating func appendInterpolation<T: TextOutputStreamable & CustomStringConvertible>(_ value: T) {
+  public mutating func appendInterpolation<T>(_ value: T)
+    where T: TextOutputStreamable, T: CustomStringConvertible
+  {
     value.write(to: &_storage)
   }
 
@@ -125,7 +127,9 @@ public struct DefaultStringInterpolation: StringInterpolationProtocol {
   ///     print(message)
   ///     // Prints "If one cookie costs 2 dollars, 3 cookies cost 6 dollars."
   @inlinable
-  public mutating func appendInterpolation<T: TextOutputStreamable>(_ value: T) {
+  public mutating func appendInterpolation<T>(_ value: T)
+    where T: TextOutputStreamable
+  {
     value.write(to: &_storage)
   }
 
@@ -147,7 +151,9 @@ public struct DefaultStringInterpolation: StringInterpolationProtocol {
   ///     print(message)
   ///     // Prints "If one cookie costs 2 dollars, 3 cookies cost 6 dollars."
   @inlinable
-  public mutating func appendInterpolation<T: CustomStringConvertible>(_ value: T) {
+  public mutating func appendInterpolation<T>(_ value: T)
+    where T: CustomStringConvertible
+  {
     _storage += value.description
   }
 
@@ -188,8 +194,8 @@ extension DefaultStringInterpolation: CustomStringConvertible {
   }
 }
 
-// While not strictly necessary, declaring these is faster than using the default
-// implementation.
+// While not strictly necessary, declaring these is faster than using the
+// default implementation.
 extension String {
   /// Creates a new instance from an interpolated string literal.
   ///