Preserve whitespace for first argument on next line.

This whitespace has meaning since it's denoting
that this line is the first argument of the
previous lines function call.

Author: Daniel Phillips

lib/Sema/TypeCheckDecl.cpp

@@ -3173,7 +3173,7 @@ class DeclChecker : public DeclVisitor<DeclChecker> {
         TAD->getUnderlyingTypeLoc().setInvalidType(TC.Context);
       } else if (TAD->getDeclContext()->isGenericContext()) {
         TAD->setInterfaceType(
-        TC.getInterfaceTypeFromInternalType(TAD->getDeclContext(),
+          TC.getInterfaceTypeFromInternalType(TAD->getDeclContext(),
                                               TAD->getType()));
       }