Make a number of small changes to ease the backport to distutils2
diff --git a/Lib/packaging/compiler/unixccompiler.py b/Lib/packaging/compiler/unixccompiler.py
index c857d03..3458faa 100644
--- a/Lib/packaging/compiler/unixccompiler.py
+++ b/Lib/packaging/compiler/unixccompiler.py
@@ -127,7 +127,7 @@
executables['ranlib'] = ["ranlib"]
# Needed for the filename generation methods provided by the base
- # class, CCompiler. NB. whoever instantiates/uses a particular
+ # class, CCompiler. XXX whoever instantiates/uses a particular
# UnixCCompiler instance should set 'shared_lib_ext' -- we set a
# reasonable common default here, but it's not necessarily used on all
# Unices!