Auto merge of #30053 - JIghtuse:master, r=steveklabnik

bors · bors · commit 1805bba39980 · 2015-11-26T00:20:37.000Z
diff --git a/src/doc/book/error-handling.md b/src/doc/book/error-handling.md
@@ -681,6 +681,7 @@ fn double_arg(mut argv: env::Args) -> Result<i32, String> {
     argv.nth(1)
         .ok_or("Please give at least one argument".to_owned())
         .and_then(|arg| arg.parse::<i32>().map_err(|err| err.to_string()))
+        .map(|n| 2 * n)
 }
 
 fn main() {

Original file line number	Diff line number	Diff line change
`@@ -681,6 +681,7 @@ fn double_arg(mut argv: env::Args) -> Result<i32, String> {`
`681`	`681`	`argv.nth(1)`
`682`	`682`	`.ok_or("Please give at least one argument".to_owned())`
`683`	`683`	`.and_then(\|arg\| arg.parse::<i32>().map_err(\|err\| err.to_string()))`
	`684`	`+ .map(\|n\| 2 * n)`
`684`	`685`	`}`
`685`	`686`
`686`	`687`	`fn main() {`