Replace backticks with repr() or "%r"

From SF patch #852334.
diff --git a/Lib/test/test_fcntl.py b/Lib/test/test_fcntl.py
index 530ca0c..1dabfa4 100755
--- a/Lib/test/test_fcntl.py
+++ b/Lib/test/test_fcntl.py
@@ -33,7 +33,7 @@
     lockdata = struct.pack('hh'+start_len+'hh', fcntl.F_WRLCK, 0, 0, 0, 0, 0)
 if lockdata:
     if verbose:
-        print 'struct.pack: ', `lockdata`
+        print 'struct.pack: ', repr(lockdata)
 
 # the example from the library docs
 f = open(filename, 'w')
@@ -44,7 +44,7 @@
 if sys.platform not in ['os2emx']:
     rv = fcntl.fcntl(f.fileno(), fcntl.F_SETLKW, lockdata)
     if verbose:
-        print 'String from fcntl with F_SETLKW: ', `rv`
+        print 'String from fcntl with F_SETLKW: ', repr(rv)
 
 f.close()
 os.unlink(filename)