Auto merge of rust-lang#2640 - Rageking8:fix-dupe-word-typos, r=saethlin

Fix dupe word typos

cargo-miri/src/phases.rs

@@ -528,7 +528,7 @@ pub fn phase_runner(mut binary_args: impl Iterator<Item = String>, phase: Runner
     cmd.args(binary_args);
 
     // Make sure we use the build-time working directory for interpreting Miri/rustc arguments.
-    // But then we need to switch to the run-time one, which we instruct Miri do do by setting `MIRI_CWD`.
+    // But then we need to switch to the run-time one, which we instruct Miri do by setting `MIRI_CWD`.
     cmd.current_dir(info.current_dir);
     cmd.env("MIRI_CWD", env::current_dir().unwrap());
 

src/stacked_borrows/mod.rs

@@ -252,7 +252,7 @@ pub fn err_sb_ub<'tcx>(
 /// We need to make at least the following things true:
 ///
 /// U1: After creating a `Uniq`, it is at the top.
-/// U2: If the top is `Uniq`, accesses must be through that `Uniq` or remove it it.
+/// U2: If the top is `Uniq`, accesses must be through that `Uniq` or remove it.
 /// U3: If an access happens with a `Uniq`, it requires the `Uniq` to be in the stack.
 ///
 /// F1: After creating a `&`, the parts outside `UnsafeCell` have our `SharedReadOnly` on top.