Change occurrence of % to format()

Author: DimitriPapadopoulos

numcodecs/zfpy.py

@@ -86,7 +86,7 @@ def decode(self, buf, out=None):
                 return dec
 
         def __repr__(self):
-            r = "%s(mode=%r, tolerance=%s, rate=%s, precision=%s)" % (
+            r = "{}(mode={!r}, tolerance={}, rate={}, precision={})".format(
                 type(self).__name__,
                 self.mode,
                 self.tolerance,