Resolve semicolon_if_nothing_returned clippy lints

error: consider adding a `;` to the last statement for consistent formatting
       --> serde_derive/src/internals/attr.rs:559:25
        |
    559 |                         serde_path.set(&m.path, path)
        |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add a `;` here: `serde_path.set(&m.path, path);`
        |
    note: the lint level is defined here
       --> serde_derive/src/lib.rs:18:22
        |
    18  | #![deny(clippy::all, clippy::pedantic)]
        |                      ^^^^^^^^^^^^^^^^
        = note: `#[deny(clippy::semicolon_if_nothing_returned)]` implied by `#[deny(clippy::pedantic)]`
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned

    error: consider adding a `;` to the last statement for consistent formatting
        --> serde_derive/src/internals/attr.rs:1612:9
         |
    1612 |         cx.error_spanned_by(lit, format!("failed to parse path: {:?}", string.value()))
         |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add a `;` here: `cx.error_spanned_by(lit, format!("failed to parse path: {:?}", string.value()));`
         |
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned

    error: consider adding a `;` to the last statement for consistent formatting
        --> serde_derive/src/internals/attr.rs:1623:9
         |
    1623 |         cx.error_spanned_by(lit, format!("failed to parse path: {:?}", string.value()))
         |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add a `;` here: `cx.error_spanned_by(lit, format!("failed to parse path: {:?}", string.value()));`
         |
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned

    error: consider adding a `;` to the last statement for consistent formatting
        --> serde_derive/src/internals/attr.rs:1649:9
         |
    1649 | /         cx.error_spanned_by(
    1650 | |             lit,
    1651 | |             format!("failed to parse type: {} = {:?}", attr_name, string.value()),
    1652 | |         )
         | |_________^
         |
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned
    help: add a `;` here
         |
    1649 |         cx.error_spanned_by(
    1650 |             lit,
    1651 |             format!("failed to parse type: {} = {:?}", attr_name, string.value()),
    1652 |         );
         |

    error: consider adding a `;` to the last statement for consistent formatting
       --> serde_derive/src/internals/check.rs:260:9
        |
    260 | /         cx.error_spanned_by(
    261 | |             cont.original,
    262 | |             format!("variant field name `{}` conflicts with internal tag", tag),
    263 | |         )
        | |_________^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned
    help: add a `;` here
        |
    260 |         cx.error_spanned_by(
    261 |             cont.original,
    262 |             format!("variant field name `{}` conflicts with internal tag", tag),
    263 |         );
        |

    error: consider adding a `;` to the last statement for consistent formatting
        --> serde_derive/src/de.rs:2090:9
         |
    2090 |         flat_fields.extend(aliases.iter().map(|alias| (alias, ident)))
         |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add a `;` here: `flat_fields.extend(aliases.iter().map(|alias| (alias, ident)));`
         |
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned

serde_derive/src/de.rs

@@ -2087,7 +2087,7 @@ fn deserialize_identifier(
 ) -> Fragment {
     let mut flat_fields = Vec::new();
     for (_, ident, aliases) in fields {
-        flat_fields.extend(aliases.iter().map(|alias| (alias, ident)))
+        flat_fields.extend(aliases.iter().map(|alias| (alias, ident)));
     }
 
     let field_strs: &Vec<_> = &flat_fields.iter().map(|(name, _)| name).collect();