Deindentation here and there and minor rephrasing

Author: JJ

doc/Type/Metamodel/PrivateMethodContainer.pod6

@@ -7,10 +7,10 @@
     role Metamodel::PrivateMethodContainer { ... }
 
 I<Warning>: this role is part of the Rakudo implementation, and is not
-a part of the language specification.
+a part of the Raku language specification.
 
 In Raku, classes, roles and grammars can have private methods, that is,
-methods that are only callable from within the class, and are not inherited by
+methods that are only callable from within it, and are not inherited by
 types derived by inheritance.
 
     class A {
@@ -33,35 +33,35 @@ attributes with methods.
 =head2 method add_private_method
 
 =for code :skip-test
-    method add_private_method(Metamodel::PrivateMethodContainer: $obj, $name, $code)
+method add_private_method(Metamodel::PrivateMethodContainer: $obj, $name, $code)
 
 Adds a private method C<$code> with name C<$name>.
 
 =head2 method private_method_table
 
 =for code :skip-test
-    method private_method_table(Metamodel::PrivateMethodContainer: $obj)
+method private_method_table(Metamodel::PrivateMethodContainer: $obj)
 
 Returns a hash of C«name => &method_object»
 
 =head2 method private_methods
 
 =for code :skip-test
-    method private_methods($obj)
+method private_methods($obj)
 
 Returns a list of private method names.
 
 =head2 method private_method_names
 
 =for code :skip-test
-    method private_method_names($obj)
+method private_method_names($obj)
 
 Alias to C<private_methods>.
 
 =head2 method find_private_method
 
 =for code :skip-test
-    method find_private_method($obj, $name)
+method find_private_method($obj, $name)
 
 Locates a private method. Otherwise, returns L<C<Mu>|/type/Mu> if it doesn't
 exist.