Hi, Automakers.

  The attached patch fixes bug#24507.

  I don't fully understand the cause, but I guess that the "if 
%?INSTALL%" block gets ignored when "noinst" is present, including the 
"?FIRST?" it contains, which defines the missing "am__pep3147_tweak".

  Anyway, moving the "?FIRST?" block with the declaration of 
"am__pep3147_tweak" outside the "if %?INSTALL%" block fixes the issue. 
All tests with "py" in the name pass.

  This isn't the first time either. The test I've updated was for a 
similar case - bug#10995 ("am__py_compile doesn't get correctly 
defined when there a 'noinst_PYTHON' declaration precedes a 
'foo_PYTHON' declaration"), that's probably why "am__py_compile" is in 
its own "?FIRST?" block at the top now.

  No other language XX.am files seem to have "?FIRST?" inside an "if" 
block.

-- 
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