Chapter titles that get split over multiple lines in the typeset

formats can't have whitespace after the last non-blank character (bug
in LaTeX?); fix up a couple of instances of this.

Update an email address.

Doc/tut/tut.tex

@@ -4184,8 +4184,7 @@ and may already contain the solution for your problem.
 
 \appendix
 
-\chapter{Interactive Input Editing and History Substitution
-         \label{interacting}}
+\chapter{Interactive Input Editing and History Substitution\label{interacting}}
 
 Some versions of the Python interpreter support editing of the current
 input line and history substitution, similar to facilities found in
@@ -4347,9 +4346,8 @@ check (or even suggest) matching parentheses, quotes, etc., would also
 be useful.
 
 
-\chapter{Floating Point Arithmetic:  Issues and Limitations
-         \label{fp-issues}}
-\sectionauthor{Tim Peters}{tim.one@home.com}
+\chapter{Floating Point Arithmetic:  Issues and Limitations\label{fp-issues}}
+\sectionauthor{Tim Peters}{tim_one@email.msn.com}
 
 Floating-point numbers are represented in computer hardware as
 base 2 (binary) fractions.  For example, the decimal fraction