fix some typos

Signed-off-by: cuishuang <imcusg@gmail.com>

Author: cuishuang

src/parse/session.rs

@@ -152,7 +152,7 @@ impl ParseSess {
     /// * `relative` - If Some(symbol), the symbol name is a directory relative to the dir_path.
     ///   If relative is Some, resolve the submodle at {dir_path}/{symbol}/{id}.rs
     ///   or {dir_path}/{symbol}/{id}/mod.rs. if None, resolve the module at {dir_path}/{id}.rs.
-    /// *  `dir_path` - Module resolution will occur relative to this direcotry.
+    /// *  `dir_path` - Module resolution will occur relative to this directory.
     pub(crate) fn default_submod_path(
         &self,
         id: symbol::Ident,

tests/rustfmt/main.rs

@@ -143,7 +143,7 @@ fn mod_resolution_error_relative_module_not_found() {
     let args = ["tests/mod-resolver/module-not-found/relative_module/lib.rs"];
     let (_stdout, stderr) = rustfmt(&args);
     // The file `./a.rs` and directory `./a` both exist.
-    // Module resolution fails becuase we're unable to find `./a/b.rs`
+    // Module resolution fails because we're unable to find `./a/b.rs`
     #[cfg(not(windows))]
     assert!(stderr.contains("a/b.rs does not exist"));
     #[cfg(windows)]