Added docs for method of in class Hash and removed som trailing space…

…s. rindolf++

doc/Type/Hash.pod

@@ -326,10 +326,10 @@ Usage:
 
     Hash.default
 
-Returns the default value of the invocant, i.e. the value which is returned 
+Returns the default value of the invocant, i.e. the value which is returned
 when a non existing key is used to access an element in the C<Hash>.
-Unless the C<Hash> is declared as having a default value by using the 
-L<is default|/routine/is default> trait the method returns the type object 
+Unless the C<Hash> is declared as having a default value by using the
+L<is default|/routine/is default> trait the method returns the type object
 C<(Any)>.
 
     my %h1 = 'apples' => 3, 'oranges' => 7;
@@ -350,7 +350,7 @@ Usage:
 
     Hash.keyof
 
-Returns the type constraint for the keys of the invocant. For 
+Returns the type constraint for the keys of the invocant. For
 normal hashes the method returns the coercion type C<(Str(Any))>
 while for L<object hashes|/type/Hash#Object_hashes_and_type_constraints>
 the type used in the declaration of the C<Hash> is returned.
@@ -362,6 +362,26 @@ the type used in the declaration of the C<Hash> is returned.
     say %h2.keyof;                           # (Str)
     %h2{3} = 'apples';                       # throws exception of type X::TypeCheck::Binding
 
+=head2 method of
+
+Defined as:
+
+    method of 
+
+Usage:
+
+    Hash.of
+
+Returns the type constraint for the values of the invocant. By default,
+i.e. if no type constraint is given during declaration, the method
+returns C<(Mu)>.
+
+    my %h1 = 'apples' => 3, 'oranges' => 7;  # (no type constraint specified)
+    say %h1.of;                              # (Mu)
+
+    my Int %h2 = 'oranges' => 7;             # (values must be of type Int)
+    say %h2.of;                              # (Int)
+
 =head1 Subscript Adverbs
 
 Some methods are implemented as adverbs on subscripts.