diff --git a/Lib/string.py b/Lib/string.py
index daf9863..e4d9e4f 100644
--- a/Lib/string.py
+++ b/Lib/string.py
@@ -532,9 +532,8 @@
 # the Formatter class
 # see PEP 3101 for details and purpose of this class
 
-# The hard parts are reused from the C implementation.  They're
-# exposed here via the sys module.  sys was chosen because it's always
-# available and doesn't have to be dynamically loaded.
+# The hard parts are reused from the C implementation.  They're exposed as "_"
+# prefixed methods of str and unicode.
 
 # The overall parser is implemented in str._formatter_parser.
 # The field name parser is implemented in str._formatter_field_name_split