[Any, Code] move signatures out of headlines

eventually I want to link to methods in a class like doc.perl6.org/type/Code#signature so it makes sense to have only the method name as a heading

Author: moritz

lib/Any.pod

@@ -10,7 +10,9 @@ most built-in classes.
 
 =head2 Methods
 
-=head3 ACCEPTS(Any:D: Mu $other)
+=head3 ACCEPTS
+
+    multi method ACCEPTS(Any:D: Mu $other)
 
 Returns C<True> if C<$other === self> (ie it checks object identity).
 

lib/Code.pod

@@ -12,14 +12,18 @@ from blocks, subroutines or methods) will be of some subclass of C<Code>.
 
 =head2 Methods
 
-=head3 ACCEPTS(Code:D: Mu $topic)
+=head3 ACCEPTS
+
+    multi method ACCEPTS(Code:D: Mu $topic)
 
 Usually calls the code object and passes C<$topic> as an argument.
 However, when called on a code object that takes no arguments, the code
 object is invoked with no arguments and C<$topic> is dropped. The
 result of the call is returned.
 
-=head3 arity(Code:D:) returns Int:D
+=head3 arity
+
+    method arity(Code:D:) returns Int:D
 
 Returns the minimum number of positional arguments that must be passed
 in order to call the code object. Any optional or slurpy parameters in the
@@ -32,7 +36,9 @@ code object's C<Signature> do not contribute, nor do named parameters.
     say &args.arity;                # 1
     say &slurpy.arity;              # 2
 
-=head3 count(Code:D:) returns Real:D
+=head3 count
+
+    method count(Code:D:) returns Real:D
 
 Returns the maximum number of positional arguments that may be passed
 when calling the code object. For code objects that can accept any
@@ -46,12 +52,16 @@ C<count> will return C<Inf>. Named parameters do not contribute.
     say &args.count;                # 2
     say &slurpy.count;              # Inf
 
-=head3 signature(Code:D:) returns Signature:D
+=head3 signature
+
+    multi method signature(Code:D:) returns Signature:D
 
 Returns the C<Signature> object for this code object, which describes
 its parameters.
 
-=head3 Str(Code:D:) returns Str:D
+=head3 Str
+
+    multi method Str(Code:D:) returns Str:D
 
 Returns the name of the code object.