Some rewriting and eliminating a TODO

Author: JJ

doc/Language/subscripts.pod6

@@ -4,7 +4,7 @@
 
 =SUBTITLE Accessing data structure elements by index or key
 
-Often one needs to refer to a specific element (or specific slice of
+One often needs to refer to a specific element (or slice of
 elements) of a collection or data structure. Borrowing from mathematical
 notation where the components of a vector I<v> would be referred to as
 I<v₁, v₂, v₃>, this concept is called "subscripting" (or "indexing") in
@@ -649,9 +649,7 @@ subscripting interface.
 
 =head2 Custom type example
 
-=comment TODO: Maybe factor this out into a tutorial page
-
-Imagine a HTTP::Header type which, despite being a custom class with special
+Imagine a C<HTTP::Header> type which, despite being a custom class with special
 behavior, can be indexed like a hash:
 
     =begin code
@@ -667,7 +665,7 @@ behavior, can be indexed like a hash:
     my $rawheader = $request.header.Str;  # stringify according to HTTP spec
     =end code
 
-The simplest way to implement this class, would be to give it an attribute of
+A simple way to implement this class would be to give it an attribute of
 type L<Hash>, and delegate all subscripting and iterating related functionality
 to that attribute (using a custom type constraint to make sure users don't
 insert anything invalid into it):