allow PYTHONPATH to override Homebrew site-packages
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				@ -1361,7 +1361,7 @@ class Formula
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    user_site_packages.mkpath
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    (user_site_packages/"homebrew.pth").write <<-EOS.undent
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      import site; site.addsitedir("#{HOMEBREW_PREFIX}/lib/python2.7/site-packages")
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      import sys; sys.path.insert(0, "#{HOMEBREW_PREFIX}/lib/python2.7/site-packages")
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      import sys, os; sys.path = (os.environ["PYTHONPATH"].split(os.pathsep) if "PYTHONPATH" in os.environ else []) + ["#{HOMEBREW_PREFIX}/lib/python2.7/site-packages"] + sys.path
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    EOS
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  end
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