ignore old lang-tour, add manual redirects, add excerpt ignore to new…

… pages

src/language/async.md

@@ -3,6 +3,8 @@ title: Asychrony support
 description: Information on writing asynchronous code in Dart.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 Dart libraries are full of functions that
 return [`Future`][] or [`Stream`][] objects.
 These functions are _asynchronous_:

src/language/classes.md

@@ -3,6 +3,8 @@ title: Classes
 description: Summary of classes, class instances, and their members.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 Dart is an object-oriented language with classes and mixin-based
 inheritance. Every object is an instance of a class, and all classes
 except `Null` descend from [`Object`][].

src/language/constructors.md

@@ -3,6 +3,8 @@ title: Constructors
 description: Everything about using constructors in Dart.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 Declare a constructor by creating a function with the same name as its
 class (plus, optionally, an additional identifier as described in
 [Named constructors](#named-constructors)).

src/language/generics.md

@@ -3,6 +3,8 @@ title: Generics
 description: Learn about generic types in Dart.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 If you look at the API documentation for the basic array type,
 [`List`][], you’ll see that the
 type is actually `List<E>`. The \<...\> notation marks List as a

src/language/mixins.md

@@ -3,6 +3,8 @@ title: Mixins
 description: Learn how to add to features to a class in Dart.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 Mixins are a way of reusing a class's code in multiple class
 hierarchies.
 

src/language/operators.md

@@ -3,6 +3,8 @@ title: Operators
 description: Learn about the operators Dart supports.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 <a name="operators"></a>
 
 Dart supports the operators shown in the following table.

src/language/typedefs.md

@@ -3,6 +3,8 @@ title: Typedefs
 description: Learn about type aliases in Dart.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 A type alias—often called a _typedef_ because
 it's declared with the keyword `typedef`—is
 a concise way to refer to a type.

src/language/variables.md

@@ -3,6 +3,8 @@ title: Variables
 description: Learn about variables in Dart.
 ---
 
+<?code-excerpt replace="/ *\/\/\s+ignore_for_file:[^\n]+\n//g; /(^|\n) *\/\/\s+ignore:[^\n]+\n/$1/g; /(\n[^\n]+) *\/\/\s+ignore:[^\n]+\n/$1\n/g; / *\/\/\s+ignore:[^\n]+//g; /([A-Z]\w*)\d\b/$1/g"?>
+
 Here’s an example of creating a variable and initializing it:
 
 <?code-excerpt "misc/lib/language_tour/variables.dart (var-decl)"?>