remove repetitive words

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -709,7 +709,7 @@ impl<B: WriteBackendMethods> WorkItem<B> {
         fn desc(short: &str, _long: &str, name: &str) -> String {
             // The short label is three bytes, and is followed by a space. That
             // leaves 11 bytes for the CGU name. How we obtain those 11 bytes
-            // depends on the the CGU name form.
+            // depends on the CGU name form.
             //
             // - Non-incremental, e.g. `regex.f10ba03eb5ec7975-cgu.0`: the part
             //   before the `-cgu.0` is the same for every CGU, so use the

compiler/rustc_data_structures/src/sync/worker_local.rs

@@ -116,7 +116,7 @@ pub struct WorkerLocal<T> {
 
 // This is safe because the `deref` call will return a reference to a `T` unique to each thread
 // or it will panic for threads without an associated local. So there isn't a need for `T` to do
-// it's own synchronization. The `verify` method on `RegistryId` has an issue where the the id
+// it's own synchronization. The `verify` method on `RegistryId` has an issue where the id
 // can be reused, but `WorkerLocal` has a reference to `Registry` which will prevent any reuse.
 #[cfg(parallel_compiler)]
 unsafe impl<T: Send> Sync for WorkerLocal<T> {}

library/portable-simd/crates/core_simd/examples/dot_product.rs

@@ -130,7 +130,7 @@ pub fn dot_prod_simd_4(a: &[f32], b: &[f32]) -> f32 {
 }
 
 // This version allocates a single `XMM` register for accumulation, and the folds don't allocate on top of that.
-// Notice the the use of `mul_add`, which can do a multiply and an add operation ber iteration.
+// Notice the use of `mul_add`, which can do a multiply and an add operation ber iteration.
 pub fn dot_prod_simd_5(a: &[f32], b: &[f32]) -> f32 {
     a.array_chunks::<4>()
         .map(|&a| f32x4::from_array(a))

library/test/src/types.rs

@@ -224,7 +224,7 @@ impl TestDesc {
         }
     }
 
-    /// Returns None for ignored test or that that are just run, otherwise give a description of the type of test.
+    /// Returns None for ignored test or tests that are just run, otherwise returns a description of the type of test.
     /// Descriptions include "should panic", "compile fail" and "compile".
     pub fn test_mode(&self) -> Option<&'static str> {
         if self.ignore {

src/tools/miri/src/mono_hash_map.rs

@@ -2,7 +2,7 @@
 //! otherwise mutated. We also box items in the map. This means we can safely provide
 //! shared references into existing items in the `FxHashMap`, because they will not be dropped
 //! (from being removed) or moved (because they are boxed).
-//! The API is is completely tailored to what `memory.rs` needs. It is still in
+//! The API is completely tailored to what `memory.rs` needs. It is still in
 //! a separate file to minimize the amount of code that has to care about the unsafety.
 
 use std::borrow::Borrow;