minor grammar/punctuation tweaks

Author: John Gabriele

lib/containers.pod

@@ -16,8 +16,8 @@ registers it in some internal symbol table. This internal symbol table is used
 to detect undeclared variables, and to tie the code generation for the
 variable to the correct scope.
 
-At run time, a variable appears as an entry in a I<lexical pad>, short
-I<lexpad>. This is a per-scope data structure that stores a pointer for each
+At run time, a variable appears as an entry in a I<lexical pad>, or I<lexpad>
+for short. This is a per-scope data structure that stores a pointer for each
 variable.
 
 In the case of C<my $x>, the lexpad entry for the variable C<$x> is a pointer
@@ -150,7 +150,7 @@ As a curious side note, Perl 6 supports binding to array elements:
     say @a;                     # 42 2 3
 
 If you've read and understood the previous explanations, it is now time to
-wonder how this can possibly work. After all binding to a variable requires a
+wonder how this can possibly work. After all, binding to a variable requires a
 lexpad entry for that variable, and while there is one for an array, there
 aren't lexpad entries for each array element (you cannot expand the lexpad at
 run time).