Replace backticks with repr() or "%r"
From SF patch #852334.
diff --git a/Lib/idlelib/TreeWidget.py b/Lib/idlelib/TreeWidget.py
index 824bdca..1c9eb2e 100644
--- a/Lib/idlelib/TreeWidget.py
+++ b/Lib/idlelib/TreeWidget.py
@@ -31,7 +31,7 @@
if os.path.isdir(_icondir):
ICONDIR = _icondir
elif not os.path.isdir(ICONDIR):
- raise RuntimeError, "can't find icon directory (%s)" % `ICONDIR`
+ raise RuntimeError, "can't find icon directory (%r)" % (ICONDIR,)
def listicons(icondir=ICONDIR):
"""Utility to display the available icons."""