Use gender neutral terms

compiler/rustc_expand/src/mbe/macro_parser.rs

@@ -315,7 +315,7 @@ pub(super) fn count_metavar_decls(matcher: &[TokenTree]) -> usize {
 /// only on the nesting depth of repetitions in the originating token tree it
 /// was derived from.
 ///
-/// In layman's terms: `NamedMatch` will form a tree representing nested matches of a particular
+/// In layperson's terms: `NamedMatch` will form a tree representing nested matches of a particular
 /// meta variable. For example, if we are matching the following macro against the following
 /// invocation...
 ///

compiler/rustc_typeck/src/check/wfcheck.rs

@@ -1657,7 +1657,7 @@ fn receiver_is_valid<'fcx, 'tcx>(
             }
         } else {
             debug!("receiver_is_valid: type `{:?}` does not deref to `{:?}`", receiver_ty, self_ty);
-            // If he receiver already has errors reported due to it, consider it valid to avoid
+            // If the receiver already has errors reported due to it, consider it valid to avoid
             // unnecessary errors (#58712).
             return receiver_ty.references_error();
         }

compiler/rustc_typeck/src/collect.rs

@@ -2700,7 +2700,7 @@ fn linkage_by_name(tcx: TyCtxt<'_>, def_id: DefId, name: &str) -> Linkage {
     // Use the names from src/llvm/docs/LangRef.rst here. Most types are only
     // applicable to variable declarations and may not really make sense for
     // Rust code in the first place but allow them anyway and trust that the
-    // user knows what s/he's doing. Who knows, unanticipated use cases may pop
+    // user knows what they're doing. Who knows, unanticipated use cases may pop
     // up in the future.
     //
     // ghost, dllimport, dllexport and linkonce_odr_autohide are not supported

library/std/src/fs/tests.rs

@@ -644,9 +644,9 @@ fn recursive_rmdir_toctou() {
     // Test for time-of-check to time-of-use issues.
     //
     // Scenario:
-    // The attacker wants to get directory contents deleted, to which he does not have access.
+    // The attacker wants to get directory contents deleted, to which they do not have access.
-    // He has a way to get a privileged Rust binary call `std::fs::remove_dir_all()` on a
+    // They have a way to get a privileged Rust binary call `std::fs::remove_dir_all()` on a
-    // directory he controls, e.g. in his home directory.
+    // directory they control, e.g. in their home directory.
     //
     // The POC sets up the `attack_dest/attack_file` which the attacker wants to have deleted.
     // The attacker repeatedly creates a directory and replaces it with a symlink from

library/std/src/thread/local.rs

@@ -980,7 +980,7 @@ pub mod fast {
         unsafe fn try_initialize<F: FnOnce() -> T>(&self, init: F) -> Option<&'static T> {
             // SAFETY: See comment above (this function doc).
             if !mem::needs_drop::<T>() || unsafe { self.try_register_dtor() } {
-                // SAFETY: See comment above (his function doc).
+                // SAFETY: See comment above (this function doc).
                 Some(unsafe { self.inner.initialize(init) })
             } else {
                 None