the formatting type `t` is not in rustc 0.13.0-nightly version

for rustc 0.13.0-nightly (8bca470c5 2014-12-08 00:12:30 +0000) version, the formatting type `t` is not here, and will print error like this:
10:74 error: unknown format trait `t`
Merge pull request #297 from geekcraik/master

the formatting type `t` is not in rustc 0.13.0-nightly version
Change some URLs from japaric to rust-lang
Merge pull request #301 from brson/japaric

Change some URLs from japaric to rust-lang
Set proper `make serve` command
Merge pull request #302 from mdinger/readme

Set proper `make serve` command
Add phantom type examples
Changing `mkdir` to `mkdir -p` in setup-stage.sh

This will take away the warning about the folders already existing, and also
make the directories in one less line
Changed [link](example.com) to [link][example]
Merge pull request #306 from GBGamer/link-ref-correct

Changed [link](example.com) to [link][example]
Merge pull request #304 from GBGamer/master

Changing `mkdir` to `mkdir -p` in setup-stage.sh
Add chapter on command-line arguments
Merge pull request #76 from vks/args

Add chapter on commandline arguments
Merge pull request #160 from mdinger/generic_phantom

Generic phantom type
Elide lifetimes in `generics/implementation`
Merge pull request #307 from mdinger/elide_lifetimes

Elide lifetimes in `generics/implementation`
Add #[deriving(Copy)] to Point
Merge pull request #310 from GBGamer/master

Add #[deriving(Copy)] to Point
Make travis-ci not spit out so much from rustup
index: fix typo