Replace backticks with repr() or "%r"

From SF patch #852334.
diff --git a/Lib/test/test_select.py b/Lib/test/test_select.py
index 6a00fe4..eaec52b 100644
--- a/Lib/test/test_select.py
+++ b/Lib/test/test_select.py
@@ -57,7 +57,7 @@
         if (rfd, wfd, xfd) == ([p], [], []):
             line = p.readline()
             if verbose:
-                print `line`
+                print repr(line)
             if not line:
                 if verbose:
                     print 'EOF'