Do not point at macro invocation which expands to an inference error. Avoid the following:
```
error[E0308]: mismatched types
--> $DIR/does-not-have-iter-interpolated.rs:12:5
|
LL | quote!($($nonrep)*);
| ^^^^^^^^^^^^^^^^^^^
| |
| expected `HasIterator`, found `ThereIsNoIteratorInRepetition`
| expected due to this
| here the type of `has_iter` is inferred to be `ThereIsNoIteratorInRepetition`
```
Use `splice` to avoid shifting the other items twice.
Put `extern crate std;` first so it's already resolved when we resolve `::std::prelude::rust_20XX`.
Indents for `cbox` and `ibox` are 0 or `INDENT_UNIT` (4) except for a
couple of places which are `INDENT_UNIT - 1` for no clear reason.
This commit changes the three space indents to four spaces.
