Merge pull request #2068 from practicalswift/gardening-20160405

[gardening] Fix typos: refererences → references, accross → across, is → it

Author: practicalswift

docs/OptimizationTips.rst

@@ -532,7 +532,7 @@ alive.
 
     // The call to ``withExtendedLifetime(Head)`` makes sure that the lifetime of
     // Head is guaranteed to extend over the region of code that uses Unmanaged
-    // refererences. Because there exists a reference to Head for the duration
+    // references. Because there exists a reference to Head for the duration
     // of the scope and we don't modify the list of ``Node``s there also exist a
     // reference through the chain of ``Head.next``, ``Head.next.next``, ...
     // instances.
@@ -544,7 +544,7 @@ alive.
 
       // Use the unmanaged reference in a call/variable access. The use of
       // _withUnsafeGuaranteedRef allows the compiler to remove the ultimate
-      // retain/release accross the call/access.
+      // retain/release across the call/access.
 
       while let Next = Ref._withUnsafeGuaranteedRef { $0.next } {
         ...

lib/ClangImporter/SwiftLookupTable.cpp

@@ -291,7 +291,7 @@ void SwiftLookupTable::addEntry(DeclName name, SingleEntry newEntry,
   // Translate the context.
   auto contextOpt = translateContext(effectiveContext);
   if (!contextOpt) {
-    // If is is a declaration with a swift_name attribute, we might be
+    // If it is a declaration with a swift_name attribute, we might be
     // able to resolve this later.
     if (auto decl = newEntry.dyn_cast<clang::NamedDecl *>()) {
       if (decl->hasAttr<clang::SwiftNameAttr>()) {