Mention "chomp in-place"

Also touched up definition to ensure it is clear that the target itself isn't returned.

Author: molecules

doc/Language/5to6-perlfunc.pod6

@@ -209,10 +209,12 @@ it as a method, e. g. C<$fh.chmod(0o755)>.
 =item chomp VARIABLE
 
 The behavior of C<chomp> is different than in Perl 5. It leaves the
-target unaffected and I<returns> the target with a final logical newline
-removed. I. e. C<$x = "howdy\n";$y = chomp($x);> results in C<$x>
+target unaffected and I<returns> a copy of the target with a final logical newline
+removed, e.g. C<$x = "howdy\n";$y = chomp($x);> results in C<$x>
 containing "howdy\n" and C<$y> containing "howdy". Also works as a
-method, i. e. C<$y = $x.chomp>.
+method, e.g. C<$y = $x.chomp>. As with many other methods, also works
+with assignment to modify the target in place, e.g. C<$x.=chomp> results
+in C<$x> containing "howdy".
 
 =head2 chop