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

third_party/coverage-3.7.1/coverage/annotate.py

 """Source file annotation for Coverage."""
 
 import os, re
 
+from coverage.backward import sorted                    # pylint: disable=W0622
 from coverage.report import Reporter
 
 class AnnotateReporter(Reporter):
     """Generate annotated source files showing line coverage.
 
     This reporter creates annotated copies of the measured source files. Each
     .py file is copied as a .py,cover file, with a left-hand margin annotating
     each line::
 
         > def h(x):
@@ skipping 37 matching lines @@
 
         filename = cu.filename
         source = cu.source_file()
         if self.directory:
             dest_file = os.path.join(self.directory, cu.flat_rootname())
             dest_file += ".py,cover"
         else:
             dest_file = filename + ",cover"
         dest = open(dest_file, 'w')
 
-        statements = analysis.statements
-        missing = analysis.missing
-        excluded = analysis.excluded
+        statements = sorted(analysis.statements)
+        missing = sorted(analysis.missing)
+        excluded = sorted(analysis.excluded)
 
         lineno = 0
         i = 0
         j = 0
         covered = True
         while True:
             line = source.readline()
             if line == '':
                 break
             lineno += 1
@@ skipping 17 matching lines @@
                     dest.write('> ')
             elif lineno in excluded:
                 dest.write('- ')
             elif covered:
                 dest.write('> ')
             else:
                 dest.write('! ')
             dest.write(line)
         source.close()
         dest.close()