#10767: update README in crashers; not all may have a bug entry and/or be fixed.

Lib/test/crashers/README

-This directory only contains tests for outstanding bugs that cause
-the interpreter to segfault.  Ideally this directory should always
-be empty.  Sometimes it may not be easy to fix the underlying cause.
+This directory only contains tests for outstanding bugs that cause the
+interpreter to segfault.  Ideally this directory should always be empty, but
+sometimes it may not be easy to fix the underlying cause and the bug is deemed
+too obscure to invest the effort.
 
 Each test should fail when run from the command line:
 
 	./python Lib/test/crashers/weakref_in_del.py
 
-Each test should have a link to the bug report:
+Put as much info into a docstring or comments to help determine the cause of the
+failure, as well as a bugs.python.org issue number if it exists.  Particularly
+note if the cause is system or environment dependent and what the variables are.
 
-	# http://python.org/sf/BUG#
-
-Put as much info into a docstring or comments to help determine
-the cause of the failure.  Particularly note if the cause is
-system or environment dependent and what the variables are.
-
-Once the crash is fixed, the test case should be moved into an appropriate
-test (even if it was originally from the test suite).  This ensures the
-regression doesn't happen again.  And if it does, it should be easier
-to track down.
+Once the crash is fixed, the test case should be moved into an appropriate test
+(even if it was originally from the test suite).  This ensures the regression
+doesn't happen again.  And if it does, it should be easier to track down.