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

2015-11-26 00:20:37 +00:00 · 2015-11-26 00:20:37 +00:00 · 1805bba399
commit 1805bba399
parent 498f08d369 b892b5a690
1 changed files with 1 additions and 0 deletions
--- 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() {