include Spanned in the docs

The `Spanned` struct was originally included in the docs as a re-export,
but rustdoc doesn't render re-exports if the module from which it's
exported isn't documented.

Since `Spanned` is the only public item inside the `spanned` module this
commit shows the struct as a normal item in the index, and moves the
example from the module docs to the struct docs.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 30ee3bc..fb04984 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -166,5 +166,4 @@ mod tokens;
 pub mod macros;
 
 mod spanned;
-#[doc(no_inline)]
 pub use crate::spanned::Spanned;