Update documentation for Python >= 3.5 requirement

NEWS

@@ -155,6 +155,8 @@ Removed Functionality
   ``connection_state_remove`` handler can now be resolved with a less-confusing
   approach: see the ``Conn::register_removal_hook`` function.
 
+- Python 2 is no longer supported.  Python 3.5 is the new minimum requirement.
+
 Deprecated Functionality
 ------------------------
 

src/strings.bif

@@ -1405,7 +1405,7 @@ function swap_case%(str: string%) : string
 	%}
 
 ## Converts a string to Title Case. This changes the first character of each sequence of non-space characters
-## in the string to be capitalized. See https://docs.python.org/2/library/stdtypes.html#str.title for more info.
+## in the string to be capitalized. See https://docs.python.org/3/library/stdtypes.html#str.title for more info.
 ##
 ## str: The string to convert.
 ##