Rustdoc no longer processes `text, no_run` code blocks

[Aaron1011]

With Rust 1.16.0, the following snippet is parsed correctly by rustdoc:

//! ```text, no_run
//! 'aa'
//! ```

However, this appears to be broken on the latest nightly (tested on 53f4bc311 2017-04-07). The code block appears to be interpreted as rust code, giving this error:

error: character literal may only contain one codepoint: 'aa'
 --> <stdin>:1:1
  |
1 | 'aa'
  | ^^^^

[GuillaumeGomez]

Taking a look.

[steveklabnik]

So, here's something interesting: the space after the , matters. That is, on stable

//! ```text, no_run

passes but

//! ```text,no_run

fails.

This might be considered a bugfix; it really depends. text,no_run is pretty incoherent as a combination of attributes, semantically speaking.

We should talk about this at the @rust-lang/docs meeting

[GuillaumeGomez]

@steveklabnik: We handle whitespaces strangely, I fix it.

[GuillaumeGomez]

@steveklabnik: I fixed the problem in the second commit.