Upgrade to coverage 3.7.1 and have it auto-build itself on first use.

third_party/coverage-3.7.1/doc/api.rst

 .. _api:
 
 ============
 Coverage API
 ============
 
 :history: 20090524T134300, brand new docs.
 :history: 20090613T164000, final touches for 3.0
 :history: 20100221T151500, docs for 3.3 (on the plane back from PyCon)
 :history: 20100725T211700, updated for 3.4.
 :history: 20121111T235800, added a bit of clarification.
 
 
 The API to coverage.py is very simple, contained in a single module called
 `coverage`.  Most of the interface is in a single class, also called
-`coverage`.  Methods on the coverage object correspond roughly to operations available
-in the command line interface. For example, a simple use would be::
+`coverage`.  Methods on the coverage object correspond roughly to operations
+available in the command line interface. For example, a simple use would be::
 
     import coverage
 
     cov = coverage.coverage()
     cov.start()
 
     # .. call your code ..
 
     cov.stop()
     cov.save()
@@ skipping 10 matching lines @@
     :members:
 
 
 Starting coverage automatically
 -------------------------------
 
 This function is used to start coverage measurement automatically when Python
 starts.  See :ref:`subprocess` for details.
 
 .. autofunction:: process_startup