[basics] start to updated description of the new first example

src/basics.pod

@@ -133,7 +133,7 @@ the argument provided to C<open>.
 
 =begin programlisting
 
-    my @names = $file.get.split(' ');
+    my @names = $file.get.words;
 
 =end programlisting
 
@@ -143,26 +143,17 @@ X<invocant>
 
 The right-hand side calls a I<method> --a named group of behavior-- named C<get>
 on the file handle stored in C<$file>.  The C<get> method reads and returns 
-one line from the file, removing the line ending.  C<split> is also a method, 
-called on the string returned from C<get>.  C<split>'s single argument is 
-a string containing a space character.  C<split> decomposes its 
-I<invocant>--the string on which it operates--into a list of strings. 
+one line from the file, removing the line ending.  C<words> is also a method, 
+called on the string returned from C<get>. C<words> decomposes its 
+I<invocant>--the string on which it operates--into a list of words, which
+here means strings without whitespace.
 It turns the single string C<'Beth Ana Charlie Dave'> into the list of 
-strings C<'Beth', 'Ana', 'Charlie', 'Dave'>.  Finally, this list gets
+strings C<'Beth', 'Ana', 'Charlie', 'Dave'>. 
+
+Finally, this list gets
 stored in the array C<@names>.  The C<@> sigil marks the declared variable as
 an C<Array>.  Arrays store ordered lists.
 
-=begin sidebar
-
-Splitting on a single blank is not very robust, and breaks the code when
-spaces are at the end of a line, or more than one blank in a row, or even an empty
-line in the input file. You will learn a more robust method for data
-extraction in the chapter about regexes.
-
-TODO: proper cross-link
-
-=end sidebar
-
 =begin programlisting
 
     my %matches;