Replace backticks with repr() or "%r"

From SF patch #852334.
diff --git a/Mac/Tools/IDE/PyFontify.py b/Mac/Tools/IDE/PyFontify.py
index 5680aa8..eb37ad3 100644
--- a/Mac/Tools/IDE/PyFontify.py
+++ b/Mac/Tools/IDE/PyFontify.py
@@ -152,4 +152,4 @@
 	f.close()
 	tags = fontify(text)
 	for tag, start, end, sublist in tags:
-		print tag, `text[start:end]`
+		print tag, repr(text[start:end])