Minor grammar and typographic corrections in reify

Author: JJ

doc/Language/glossary.pod6

@@ -830,11 +830,11 @@ other things use the concept as well. For example, an un-reified L<Range> is jus
 the two end points. In some languages, calculating the sum of a huge range is a
 lengthy and memory-consuming process, but Perl 6 calculates it instantly:
 
-    say sum 1 ..9_999_999_999_999; # OUTPUT: «49999999999995000000000000␤»
+    say sum 1 .. 9_999_999_999_999; # OUTPUT: «49999999999995000000000000␤»
 
-Why? Because the sum can be calculated I<without> reifying the Range; that is
+Why? Because the sum can be calculated I<without> reifying the Range; that is,
 without figuring out all the elements it contains. This is why this feature
-exists. You can even make your own things you can reify-on-demand, using
+exists. You can even make your own things reify-on-demand, using
 L«C<gather> and C<take>|/syntax/gather%20take»:
 
     my $seq = gather {
@@ -859,10 +859,10 @@ L«C<gather> and C<take>|/syntax/gather%20take»:
     # (1 2)
 
 Following the output above, you can see the print statements I<inside> the
-C<gather> got printed only when we reified the individual elements while looking
-up an element. Also note, the elements got reified just once. When we printed
+C<gather> got executed only when we reified the individual elements while looking
+up an element. Also note that the elements got reified just once. When we printed
 the same elements again on the last line of the example, the messages inside
-C<gather> we no longer printed. This is because the construct used
+C<gather> was no longer printed. This is because the construct used
 already-reified elements from the L<Seq>'s cache.
 
 Note that above we assigned the C<gather> to a L<Scalar> container (the C<$>