A copy-and-paste job forget the "paste" half.

Doc/lib/libprofile.tex

@@ -589,7 +589,7 @@ there are three ways you can use it:\footnote{Prior to Python 2.2, it
 import profile
 
 # 1. Apply computed bias to all Profile instances created hereafter.
-profile.Profile.bias =
+profile.Profile.bias = your_computed_bias
 
 # 2. Apply computed bias to a specific Profile instance.
 pr = profile.Profile()