Edited preface.

src/preface.pod

@@ -1,21 +1,21 @@
 =head0 Preface
 
-Perl 6 is a versatile, intuitive, and flexible programming language in active
-development. It embraces several paradigms like procedural, object oriented,
-and functional programming, and offers powerful tools for parsing text.
-
 Perl 6 is a language specification for which multiple compilers and
 interpreters exist in various stages of completeness. These implementations
-have in turn influenced the design of the Perl 6 programming language by
-highlighting misfeatures, or features that are unnecessarily hard to implement
-with little benefit. From this process we have a more cohesive and consistent
-language specification as well as multiple compilers which implement the
-language.
+have in turn influenced the design of the language by highlighting misfeatures,
+contradictions, or features of difficult implementation and little benefit.
+This process of iteration has produced a more cohesive and consistent language
+specification.
+
+Perl 6 is versatile, intuitive, and flexible.  It embraces several paradigms
+like procedural, object oriented, and functional programming, and offers
+powerful tools for parsing text.
 
-This book introduces the Perl 6 language. These examples will all run run with
-the I<Rakudo Perl 6> Compiler, but they are in no way specific to Rakudo--any
-sufficiently advanced Perl 6 implementation can run them.  Good luck and--as
-the Perl 6 community often says--have fun!
+=for author
+
+Remove the next paragraph when appropriate.
+
+=end for
 
 This book is a work-in-progress. Even releases will contain some amount of
 C<TODO> comments prior to the printing of the book.  We've left them in because
@@ -25,41 +25,43 @@ understanding.
 
 =head1 Audience
 
-This book is primarily for people who want to learn Perl 6. We expect some
-experience programming in another programming language, though no
-prior knowledge of Perl is necessary. After working through this book, a
-programmer should have a solid grasp of the basics of Perl 6. That means
-that they should be able to solve their own problems with Perl 6. This
-book is not a comprehensive reference; it is a series of tutorials.
+This book is primarily for people who want to learn Perl 6. It is a series of
+tutorials, not a comprehensive reference.  We expect some experience in another
+programming language, though no prior knowledge of Perl is necessary. After
+working through this book, you should have a solid grasp of the basics of Perl
+6 sufficient to solve your own problems with Perl 6.
 
 =head1 Relationship between Perl 6 and Perl 5
 
 Perl 6 is the newest member of the family of languages known as Perl. It
 represents a major break in syntactic and semantic compatibility from Perl 5,
-and thus has a major version number increase. However, this does not mean that
-Perl 5 is going away. In fact, quite the opposite. Both Perl 5 and Perl 6 have
-active developer communities which mold the languages. Perl 5 developers try to
-extend the language in various ways while keeping backwards compatibility with
-past versions of Perl. Perl 6 developers extend the language by adding new
-syntactic and semantic features that enable more power and expressiveness
-without the restriction of backward compatibility with Perl 5 or earlier
-versions.
+thus the increase from 5 to 6. However, this does not mean that Perl 5 is going
+away. In fact, quite the opposite. Both Perl 5 and Perl 6 have active developer
+communities which mold the languages. Perl 5 developers try to extend the
+language in various ways while keeping backwards compatibility with past
+versions of Perl. Perl 6 developers extend the language by adding new syntactic
+and semantic features that enable more power and expressiveness without the
+restriction of backward compatibility with Perl 5 or earlier versions.
 
 Some might ask, "Why call it Perl if it's a different language?" Perl is more
-than just the vagaries of syntax. Perl is philosophy (there's more than one way
-to do it; easy things easy, hard things possible); Perl is customs
-(comprehensive testing); Perl is architectural edifice (the Comprehensive Perl
-Archive Network); Perl is community (perl5porters, perl6-language).  Both Perl
-5 and Perl 6 share these attributes to varying degrees. Also, due to Perl's
-habit of stealing good ideas, Perl 5 and Perl 6 have converged and will
-continue to do so as Perl 5 borrows ideas from Perl 6 and vice-versa.
+than the vagaries of syntax. Perl is philosophy (there's more than one way to
+do it; easy things easy, hard things possible); Perl is custom (comprehensive
+testing); Perl is architectural edifice (the Comprehensive Perl Archive
+Network); and Perl is community (perl5porters, perl6-language).  Both Perl 5
+and Perl 6 share these attributes to varying degrees. As well, Perl is
+syncretic.  Just as Perl borrows good ideas from other languages, so Perl 5 and
+Perl 6 share features.
 
 =head1 Perl 6 implementations
 
+X<Rakudo>
+
 Perl 6 is a specification. Any implementation that passes the official test
 suite can call itself "Perl 6". Several implementations exist at various levels
-of maturity. All of the code in this book is tested using the Rakudo Perl 6
-compiler.
+of maturity. All of the examples in this book will run with the I<Rakudo Perl
+6> Compiler, but they are in no way specific to Rakudo--any sufficiently
+advanced Perl 6 implementation can run them.  Good luck and--as the Perl 6
+community often says--have fun!
 
 =head1 Installing Rakudo
 
@@ -73,19 +75,23 @@ is available from U<http://sourceforge.net/projects/parrotwin32/files/>.
 To run a Perl 6 program with Rakudo, include the install directory in your
 system C<PATH> variable and issue a command like:
 
+=begin screen
+
     $ perl6 hello.pl
 
+=end screen
+
 =for author
 
 Did the lexical fix get merged?
 
 =end for
 
-If the Rakudo compiler is invoked without an explicit script to run, it
-enters a small interactive mode that allows Perl 6 statements to be
-executed from the command line. Each line entered is treated as a
-separate compilation unit, however (which means that subroutines are
-preserved after they are defined, but variables are not).
+If you invoke the Rakudo compiler without an explicit script to run, it enters
+a small interactive mode that allows Perl 6 statements to be executed from the
+command line. Each line entered is treated as a separate compilation unit,
+however (which means that subroutines are preserved after they are defined, but
+variables are not).
 
 =head1 Getting involved
 
@@ -105,7 +111,7 @@ The channel C<#perl6> on C<irc.freenode.net> discusses all things Perl 6.
 
 =item Mailing lists
 
-If you need some programming help with Perl 6, send an email to
+If you need programming help with Perl 6, send an email to
 C<perl6-users@perl.org>.
 
 For issues regarding the Perl 6 language specification contact