docs: linkify some contract combinators

Author: usaoc

syntax-color-doc/syntax-color/color-textoid.scrbl

@@ -1,5 +1,6 @@
 #lang scribble/manual
 @(require (for-label racket/base
+                     racket/contract
                      syntax-color/color-textoid
                      racket/gui/base
                      framework))
@@ -101,7 +102,8 @@ Like @xmethod[color:text<%> get-token-range].}
 Like @xmethod[color:text<%> get-backward-navigation-limit].}
 
 @defmethod[(get-regions)
-           (listof (list/c exact-nonnegative-integer? (or/c exact-nonnegative-integer? 'end)))]{
+           (listof (list/c exact-nonnegative-integer?
+                           (or/c exact-nonnegative-integer? 'end)))]{
 
 Like @xmethod[color:text<%> get-regions].}
 

syntax-color-doc/syntax-color/racket.scrbl

@@ -1,6 +1,7 @@
 #lang scribble/manual
 @(require (for-label racket/base
                      racket/class
+                     racket/contract
                      syntax-color/color-textoid
                      syntax-color/racket-indentation
                      syntax-color/racket-navigation
@@ -14,12 +15,12 @@ parenthesis information produced by a coloring lexer. They can work
 with any object that implements @racket[color-textoid<%>], which
 is extended by @racket[color:text<%>].
 
-@history[#:added "1.3"]
-
 @section{S-Expression Navigation}
 
 @defmodule[syntax-color/racket-navigation]
 
+@history[#:added "1.3"]
+
 @deftogether[(
 @defproc[(racket-forward-sexp [text (is-a?/c color-textoid<%>)]
                               [pos exact-nonnegative-integer?])

syntax-color-doc/syntax-color/syntax-color.scrbl

@@ -426,7 +426,7 @@ total length of preceding nodes.
 
 FIXME: many methods are not yet documented.
 
- @defconstructor[([len (or/c exact-nonnegative-integer? fasle/c)]
+ @defconstructor[([len (or/c exact-nonnegative-integer? #f)]
                   [data any/c])]{
   Creates a token tree with a single element.
  }