docs({quickstart,di}): fix code excerpts and titles (#2118)

Author: chalin

public/docs/dart/latest/guide/dependency-injection.jade

@@ -101,7 +101,7 @@ block dart-map-alternative
     As an alternative to using a configuration `Map`, we can define
     a custom configuration class:
 
-  +makeExample('lib/app_config.dart (alternative config)','config-alt')
+  +makeExcerpt('lib/app_config.dart (alternative config)','config-alt')
 
   :marked
     Defining a configuration class has a few benefits. One key benefit

public/docs/dart/latest/quickstart.jade

@@ -194,10 +194,10 @@ block project-files
       quickstart/ts/app/main.ts,
       quickstart/ts/index.html,
       quickstart/dart/pubspec.yaml,
-      quickstart/ts/styles.1.css`
-    ,null,
+      quickstart/ts/styles.css`,
+    ',,,,quickstart',
     `app/app.component.ts,
     app/main.ts,
     index.html,
     pubspec.yaml,
-    styles.css`)
+    styles.css (excerpt)`)

public/docs/ts/_cache/quickstart.jade

@@ -600,18 +600,18 @@ block project-files
       quickstart/ts/package.1.json,
       quickstart/ts/tsconfig.1.json,
       quickstart/ts/typings.1.json,
-      quickstart/ts/styles.1.css,
+      quickstart/ts/styles.css,
       quickstart/ts/systemjs.config.1.js`
     ,
-    ',,,,,,,,',
+    ',,,,,,, quickstart,',
     `app/app.component.ts,
     app/app.module.ts,
     app/main.ts,
     index.html,
     package.json,
     tsconfig.json,
     typings.json,
-    styles.css,
+    styles.css (excerpt),
     systemjs.config.js`)
 
 .l-main-section

public/docs/ts/latest/quickstart.jade

@@ -600,18 +600,18 @@ block project-files
       quickstart/ts/package.1.json,
       quickstart/ts/tsconfig.1.json,
       quickstart/ts/typings.1.json,
-      quickstart/ts/styles.1.css,
+      quickstart/ts/styles.css,
       quickstart/ts/systemjs.config.1.js`
     ,
-    ',,,,,,,,',
+    ',,,,,,, quickstart,',
     `app/app.component.ts,
     app/app.module.ts,
     app/main.ts,
     index.html,
     package.json,
     tsconfig.json,
     typings.json,
-    styles.css,
+    styles.css (excerpt),
     systemjs.config.js`)
 
 .l-main-section