Merge pull request #2015 from practicalswift/gardening-20160401

[gardening] Friday gardening: typos, file headers & PEP-8

Author: gribozavr

lib/SILOptimizer/Transforms/CSE.cpp

@@ -617,7 +617,7 @@ bool CSE::canHandle(SILInstruction *Inst) {
     return false;
   }
   if (auto *BI = dyn_cast<BuiltinInst>(Inst)) {
-    // Althouth the onFastPath builtin has no side-effects we don't want to
+    // Although the onFastPath builtin has no side-effects we don't want to
     // (re-)move it.
     if (BI->getBuiltinInfo().ID == BuiltinValueKind::OnFastPath)
       return false;

lib/SILOptimizer/Transforms/DeadCodeElimination.cpp

@@ -44,7 +44,7 @@ static bool seemsUseful(SILInstruction *I) {
     return true;
 
   if (auto *BI = dyn_cast<BuiltinInst>(I)) {
-    // Althouth the onFastPath builtin has no side-effects we don't want to
+    // Although the onFastPath builtin has no side-effects we don't want to
     // remove it.
     if (BI->getBuiltinInfo().ID == BuiltinValueKind::OnFastPath)
       return true;

lib/SILOptimizer/Utils/LoadStoreOptUtils.cpp

@@ -1,4 +1,4 @@
-//===--- LSBase.cpp -------------------------------------------------------===//
+//===--- LoadStoreOptUtils.cpp --------------------------------------------===//
 //
 // This source file is part of the Swift.org open source project
 //

lib/SILOptimizer/Utils/Local.cpp

@@ -46,7 +46,7 @@ swift::isInstructionTriviallyDead(SILInstruction *I) {
     return false;
 
   if (auto *BI = dyn_cast<BuiltinInst>(I)) {
-    // Althouth the onFastPath builtin has no side-effects we don't want to
+    // Although the onFastPath builtin has no side-effects we don't want to
     // remove it.
     if (BI->getBuiltinInfo().ID == BuiltinValueKind::OnFastPath)
       return false;

unittests/runtime/Refcounting.cpp

@@ -153,9 +153,9 @@ TEST(RefcountingTest, unowned_retain_release_n) {
   EXPECT_EQ(1u, value);
 }
 
-//////////////////////////////////////////
-// Non-atomic referenece counting tests //
-//////////////////////////////////////////
+/////////////////////////////////////////
+// Non-atomic reference counting tests //
+/////////////////////////////////////////
 
 TEST(RefcountingTest, nonatomic_release) {
   size_t value = 0;

utils/build-script

@@ -549,7 +549,8 @@ build the Debug variant of the Swift standard library and SDK overlay""",
         action="store_true")
     parser.add_argument(
         "--build-runtime-with-host-compiler",
-        help="Use the host compiler, not the self-built one to compile the swift runtime",
+        help="Use the host compiler, not the self-built one to compile the " +
+        "Swift runtime",
         action="store_true")
 
     parser.add_argument(