Includes links to new definition from various places.

Also reflows those pages, and adds regex behavior of \n. I would say
this really closes #1092, if everyone is satisfied with it.

Author: JJ

doc/Language/newline.pod6

@@ -11,7 +11,7 @@ rules to handle this. Perl 6 has the following ones:
 =item C<\n> in a string literal means Unicode codepoint 10.
 
 =item The default L<nl-out|/routine/nl-out> that is appended to a string by say
-is also C<\n>
+is also C<\n>.
 
 =item On output, when on Windows, the encoder will by default transform a C<\n>
 into a C<\r\n> when it's going to a file, process, or terminal (it won't do this
@@ -41,6 +41,11 @@ C<:nl-out> attribute when you create that handle.
     $*OUT.say: 1;     #OUTPUT: «1␤»
     $crlf-out.say: 1; #OUTPUT: «1\␤␍»
 
+In this example, where we are replicating standard output to a new handle by
+using L<IO::Special>, we are appending a C<\> to the end of the string, followed
+by a newline C<␤> and a carriage return C<␍>; everything we print to that handle
+will get those characters at the end of the line, as shown.
+
 =end pod
 
 # vim: expandtab softtabstop=4 shiftwidth=4 ft=perl6

doc/Type/IO.pod6

@@ -198,8 +198,8 @@ Defined as:
     multi sub put(Junction:D --> True)
 
 Same as L«C<print>|/type/IO#sub_print», except it uses
-L«C<print-nl>|/routine/print-nl» (which printts a newline, by default) at the
-end. L<Junction> arguments
+L«C<print-nl>|/routine/print-nl» (which prints a L<newline|/language/newline>,
+by default) at the end. L<Junction> arguments
 L<autothread|/language/glossary#index-entry-Autothreading> and the order of
 printed strings is not guaranteed.
 
@@ -214,7 +214,8 @@ Defined as:
     multi sub say(**@args --> True)
 
 Prints the "gist" of given objects. Same as L«C<put>|/type/IO#sub_put», except
-uses L«C<.gist>|/routine/gist» method to obtain string representation of the object.
+uses L«C<.gist>|/routine/gist» method to obtain string representation of the
+object.
 
 B<NOTE:> the L«C<.gist>|/routine/gist» method of some objects, such as
 L<Lists|/type/List#method_gist>, returns only B<partial> information about the

doc/Type/IO/Handle.pod6

@@ -7,10 +7,10 @@
    class IO::Handle { }
 
 
-Instances of C<IO::Handle> encapsulate an I<handle> to manipulate input/output resources.
-Usually there is no need to create directly an C<IO::Handle> instance, since it will be done
-by other roles and methods. For instance, an L<IO::Path> object provides
-an L<open> method that returns an C<IO::Handle>:
+Instances of C<IO::Handle> encapsulate an I<handle> to manipulate input/output
+resources. Usually there is no need to create directly an C<IO::Handle>
+instance, since it will be done by other roles and methods. For instance, an
+L<IO::Path> object provides an L<open> method that returns an C<IO::Handle>:
 
     my $fh = '/tmp/log.txt'.IO.open;
     say $fh.^name; # OUTPUT: IO::Handle
@@ -489,7 +489,9 @@ Defined as:
 
     method print-nl(IO::Handle:D: --> True)
 
-Writes the value of C<$.nl-out> attribute into the handle.
+Writes the value of C<$.nl-out> attribute into the handle. This attribute, by
+default, is C<␤>, but see the L<page on newline|/language/newline> for the rules
+it follows in different platforms and environments.
 
 Attempting to call this method when the handle is
 L<in binary mode|/type/IO::Handle#method_encoding> will result in
@@ -508,9 +510,9 @@ Defined as:
     multi method printf(IO::Handle:D: Cool $format, *@args)
 
 Formats a string based on the given format and arguments and C<.print>s the
-result into the filehandle.
-See L<sub sprintf|https://docs.perl6.org/type/Str#sub_sprintf> for details
-on acceptable format directives.
+result into the filehandle. See
+L<sub sprintf|https://docs.perl6.org/type/Str#sub_sprintf> for details on
+acceptable format directives.
 
 Attempting to call this method when the handle is
 L<in binary mode|/type/IO::Handle#method_encoding> will result in