A copy-and-paste job forget the "paste" half.
diff --git a/Doc/lib/libprofile.tex b/Doc/lib/libprofile.tex
index a1634b9..7adb2b8 100644
--- a/Doc/lib/libprofile.tex
+++ b/Doc/lib/libprofile.tex
@@ -589,7 +589,7 @@
 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()