Replace backticks with repr() or "%r"

From SF patch #852334.
diff --git a/Lib/bsddb/dbrecio.py b/Lib/bsddb/dbrecio.py
index 470fb41..22e382a 100644
--- a/Lib/bsddb/dbrecio.py
+++ b/Lib/bsddb/dbrecio.py
@@ -164,10 +164,10 @@
     f.seek(len(lines[0]))
     f.write(lines[1])
     f.seek(0)
-    print 'First line =', `f.readline()`
+    print 'First line =', repr(f.readline())
     here = f.tell()
     line = f.readline()
-    print 'Second line =', `line`
+    print 'Second line =', repr(line)
     f.seek(-len(line), 1)
     line2 = f.read(len(line))
     if line != line2: