Joins meta, refs #3024

doc/Language/classtut.pod6

@@ -127,7 +127,7 @@ use C<multi method new> if you do not want to disable the default constructor.
 
 C<TWEAK> is the last submethod to be called, and it has the
 advantage of having the object properties available without needing to
-use the meta object protocol. It can be used, for instance, to assign
+use the metaobject protocol. It can be used, for instance, to assign
 values to instance variables based on the values of other attributes or
 instance variables:
 
@@ -844,15 +844,15 @@ called on C<$o>. The C<:local> named argument limits the returned methods to
 those defined in the C<Programmer> class and excludes the inherited methods.
 
 The syntax of calling a method with C<.^> instead of a single dot means that
-it is actually a method call on its I<meta class>, which is a class managing
+it is actually a method call on its I<metaclass>, which is a class managing
 the properties of the C<Programmer> class – or any other class you are
-interested in. This meta class enables other ways of introspection too:
+interested in. This metaclass enables other ways of introspection too:
 
 =for code :preamble<my $o>
 say $o.^attributes.join(', ');
 say $o.^parents.map({ $_.^name }).join(', ');
 
-Finally C<$o.^name> calls the C<name> method on the meta object, which
+Finally C<$o.^name> calls the C<name> method on the metaobject, which
 unsurprisingly returns the class name.
 
 Introspection is very useful for debugging and for learning the language