fix typo in docs and comments

compiler/rustc_lint/src/types.rs

@@ -733,7 +733,7 @@ fn get_nullable_type<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<Ty<'t
 }
 
 /// Check if this enum can be safely exported based on the "nullable pointer optimization". If it
-/// can, return the the type that `ty` can be safely converted to, otherwise return `None`.
+/// can, return the type that `ty` can be safely converted to, otherwise return `None`.
 /// Currently restricted to function pointers, boxes, references, `core::num::NonZero*`,
 /// `core::ptr::NonNull`, and `#[repr(transparent)]` newtypes.
 /// FIXME: This duplicates code in codegen.

compiler/rustc_middle/src/mir/predecessors.rs

@@ -33,7 +33,7 @@ impl PredecessorCache {
         self.cache = OnceCell::new();
     }
 
-    /// Returns the the predecessor graph for this MIR.
+    /// Returns the predecessor graph for this MIR.
     #[inline]
     pub(super) fn compute(
         &self,

compiler/rustc_mir/src/borrow_check/member_constraints.rs

@@ -71,7 +71,7 @@ impl<'tcx> MemberConstraintSet<'tcx, ty::RegionVid> {
     /// Pushes a member constraint into the set.
     ///
     /// The input member constraint `m_c` is in the form produced by
-    /// the the `rustc_middle::infer` code.
+    /// the `rustc_middle::infer` code.
     ///
     /// The `to_region_vid` callback fn is used to convert the regions
     /// within into `RegionVid` format -- it typically consults the

compiler/rustc_mir_build/src/build/matches/mod.rs

@@ -321,7 +321,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             let target_block = self.cfg.start_new_block();
             let mut schedule_drops = true;
             // We keep a stack of all of the bindings and type asciptions
-            // from the the parent candidates that we visit, that also need to
+            // from the parent candidates that we visit, that also need to
             // be bound for each candidate.
             traverse_candidate(
                 candidate,

compiler/rustc_parse/src/parser/ty.rs

@@ -67,7 +67,7 @@ impl<'a> Parser<'a> {
 
     /// Parse a type suitable for a function or function pointer parameter.
     /// The difference from `parse_ty` is that this version allows `...`
-    /// (`CVarArgs`) at the top level of the the type.
+    /// (`CVarArgs`) at the top level of the type.
     pub(super) fn parse_ty_for_param(&mut self) -> PResult<'a, P<Ty>> {
         self.parse_ty_common(AllowPlus::Yes, RecoverQPath::Yes, AllowCVariadic::Yes)
     }

compiler/rustc_span/src/symbol.rs

@@ -110,7 +110,7 @@ symbols! {
     // called `sym::proc_macro` because then it's easy to mistakenly think it
     // represents "proc_macro".
     //
-    // As well as the symbols listed, there are symbols for the the strings
+    // As well as the symbols listed, there are symbols for the strings
     // "0", "1", ..., "9", which are accessible via `sym::integer`.
     //
     // The proc macro will abort if symbols are not in alphabetical order (as

compiler/rustc_target/src/spec/wasm32_wasi.rs

@@ -30,7 +30,7 @@
 //! ## No interop with C required
 //!
 //! By default the `crt-static` target feature is enabled, and when enabled
-//! this means that the the bundled version of `libc.a` found in `liblibc.rlib`
+//! this means that the bundled version of `libc.a` found in `liblibc.rlib`
 //! is used. This isn't intended really for interoperation with a C because it
 //! may be the case that Rust's bundled C library is incompatible with a
 //! foreign-compiled C library. In this use case, though, we use `rust-lld` and

compiler/rustc_typeck/src/check/mod.rs

@@ -1843,7 +1843,7 @@ fn binding_opaque_type_cycle_error(
 ) {
     let mut err = struct_span_err!(tcx.sess, span, E0720, "cannot resolve opaque type");
     err.span_label(span, "cannot resolve opaque type");
-    // Find the the owner that declared this `impl Trait` type.
+    // Find the owner that declared this `impl Trait` type.
     let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
     let mut prev_hir_id = hir_id;
     let mut hir_id = tcx.hir().get_parent_node(hir_id);