warning: doc list item overindented
      --> src/format.rs:29:5
       |
    29 | ///    unsigned integers and strings.
       |     ^^^ help: try using `  ` (2 spaces)
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#doc_overindented_list_items
       = note: `-W clippy::doc-overindented-list-items` implied by `-W clippy::all`
       = help: to override `-W clippy::all` add `#[allow(clippy::doc_overindented_list_items)]`

False is the default value since Cargo PR 11499.

    warning: the following explicit lifetimes could be elided: 'a
      --> src/to_tokens.rs:86:6
       |
    86 | impl<'a, T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'a, T> {
       |      ^^                                                   ^^
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#elidable_lifetime_names
       = note: `-W clippy::elidable-lifetime-names` implied by `-W clippy::pedantic`
       = help: to override `-W clippy::pedantic` add `#[allow(clippy::elidable_lifetime_names)]`
    help: elide the lifetimes
       |
    86 - impl<'a, T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'a, T> {
    86 + impl<T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'_, T> {
       |

    warning: the following explicit lifetimes could be elided: 'a
       --> src/runtime.rs:313:10
        |
    313 |     impl<'a> Iterator for Lifetime<'a> {
        |          ^^                        ^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#elidable_lifetime_names
    help: elide the lifetimes
        |
    313 -     impl<'a> Iterator for Lifetime<'a> {
    313 +     impl Iterator for Lifetime<'_> {
        |

    warning: the following explicit lifetimes could be elided: 'a
       --> src/runtime.rs:345:10
        |
    345 |     impl<'a> Iterator for Lifetime<'a> {
        |          ^^                        ^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#elidable_lifetime_names
    help: elide the lifetimes
        |
    345 -     impl<'a> Iterator for Lifetime<'a> {
    345 +     impl Iterator for Lifetime<'_> {
        |

…erator