Added a link address to Vectors page of the book

heejongahn · heejongahn · commit 9a2a06cf43f9 · 2015-04-26T02:04:38.000+09:00
At https://doc.rust-lang.org/book/vectors.html, there should be a link to Generics page but the link address is ommitted and thus link is not functioning well. So I added a link definition to the vectors.md. r? @steveklabnik
diff --git a/src/doc/trpl/vectors.md b/src/doc/trpl/vectors.md
@@ -56,3 +56,4 @@ Vectors have many more useful methods, which you can read about in [their
 API documentation][vec].
 
 [vec]: ../std/vec/index.html
+[generic]: generics.html

Original file line number	Diff line number	Diff line change
`@@ -56,3 +56,4 @@ Vectors have many more useful methods, which you can read about in [their`
`56`	`56`	`API documentation][vec].`
`57`	`57`
`58`	`58`	`[vec]: ../std/vec/index.html`
	`59`	`+[generic]: generics.html`