Nom breaks `dbg` macro from std

[chifflier]

Nom defines a dbg macro, which unfortunately breaks the same macro from std (even without adding a use for it, it seems the namespaces aren't working as expected).

Minimal code to reproduce (nom 5.0, rustc 1.37):

#[macro_use]
extern crate nom;

fn test() {
    let a = 1;
    dbg!(&a);
}

fails with error:

error: unexpected end of macro invocation
 --> tests/nom.rs:7:12
  |
7 |     dbg!(&a);
  |            ^ missing tokens in macro arguments

Suggestion: rename dbg
Workaround: replace line with ::std::dbg!(&a)

[Geal]

hmm, I should have removed that one before, this makes a breaking change :/
I'll see if a 6.0 can happen soon enough

[Geal]

fixed in e799e76, dbg! is now dbg_basic!