Fix some clippy lints

fish-rust/src/fork_exec/postfork.rs

@@ -597,7 +597,7 @@ mod ffi {
             is_parent,
             pid,
             desired_pgid,
-            job_id.try_into().unwrap(),
+            job_id.into(),
             command_str,
             argv0_str,
         )

fish-rust/src/lib.rs

@@ -9,6 +9,7 @@
 #![allow(clippy::comparison_chain)]
 #![allow(clippy::derivable_impls)]
 #![allow(clippy::field_reassign_with_default)]
+#![allow(clippy::get_first)]
 #![allow(clippy::if_same_then_else)]
 #![allow(clippy::manual_is_ascii_check)]
 #![allow(clippy::mut_from_ref)]

fish-rust/src/operation_context.rs

@@ -17,6 +17,7 @@ pub const EXPANSION_LIMIT_DEFAULT: usize = 512 * 1024;
 /// A smaller limit for background operations like syntax highlighting.
 pub const EXPANSION_LIMIT_BACKGROUND: usize = 512;
 
+#[allow(clippy::enum_variant_names)]
 enum Vars<'a> {
     // The parser, if this is a foreground operation. If this is a background operation, this may be
     // nullptr.

fish-rust/src/output.rs

@@ -38,7 +38,7 @@ extern "C" fn output_set_color_support(val: u8) {
 fn term_supports_color_natively(term: &Term, c: u8) -> bool {
     #[allow(clippy::int_plus_one)]
     if let Some(max_colors) = term.max_colors {
-        max_colors >= usize::try_from(c).unwrap() + 1
+        max_colors >= usize::from(c) + 1
     } else {
         false
     }

fish-rust/src/smoke.rs

@@ -9,6 +9,11 @@ pub fn add(left: usize, right: usize) -> usize {
     left + right
 }
 
+use crate::ffi_tests::add_test;
+add_test!("test_add", || {
+    assert_eq!(add(2, 3), 5);
+});
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -19,8 +24,3 @@ mod tests {
         assert_eq!(result, 4);
     }
 }
-
-use crate::ffi_tests::add_test;
-add_test!("test_add", || {
-    assert_eq!(add(2, 3), 5);
-});