[gardening] Fix recently introduced whitespace typos. (#2443)

Author: practicalswift

include/swift/Reflection/TypeRef.h

@@ -94,7 +94,7 @@ class TypeRefID {
                          (((uint32_t) String[i+3]) << 24);
         Bits.push_back(entry);
       }
-      for(; i < String.size(); ++i) {
+      for (; i < String.size(); ++i) {
         Bits.push_back(String[i]);
       }
     }

lib/SILOptimizer/Transforms/DeadStoreElimination.cpp

@@ -597,7 +597,7 @@ void DSEContext::processBasicBlockForGenKillSet(SILBasicBlock *BB) {
 
   // Handle SILArgument for base invalidation.
   ArrayRef<SILArgument *> Args = BB->getBBArgs();
-  for(auto &X : Args) {
+  for (auto &X : Args) {
     invalidateBase(X, BBState, DSEKind::BuildGenKillSet);
   }
 }
@@ -640,7 +640,7 @@ void DSEContext::processBasicBlockForDSE(SILBasicBlock *BB, bool Optimistic) {
 
   // Handle SILArgument for base invalidation.
   ArrayRef<SILArgument *> Args = BB->getBBArgs();
-  for(auto &X : Args) {
+  for (auto &X : Args) {
     invalidateBase(X, S, DSEKind::BuildGenKillSet);
   }
 

stdlib/private/StdlibCollectionUnittest/CheckCollectionInstance.swift.gyb

@@ -356,8 +356,8 @@ public func check${Traversal}Collection<
     instances,
     distances: distances,
     of: collection,
-    distanceOracle: { (x:Int,y:Int) in numericCast(y - x) },
-    advanceOracle: { x,y in nextN(distances[y], instances[x]) },
+    distanceOracle: { (x:Int, y:Int) in numericCast(y - x) },
+    advanceOracle: { x, y in nextN(distances[y], instances[x]) },
     startIndex: collection.startIndex,
     endIndex: next5(partWay1), ${trace})
 

stdlib/public/Platform/Platform.swift

@@ -103,7 +103,7 @@ public var errno : Int32 {
   get {
 #if os(OSX) || os(iOS) || os(watchOS) || os(tvOS) || os(FreeBSD)
     return __error().pointee
-//FIXME: os(Windows) should be replaced, such as triple(Cygwin)
+// FIXME: os(Windows) should be replaced, such as triple(Cygwin)
 #elseif os(Android) || os(Windows)
     return __errno().pointee
 #else