RefCell::get_mut: fix typo

and fix the same typo in a bunch of other places

Author: RalfJung

crates/flycheck/src/lib.rs

@@ -362,7 +362,7 @@ impl FlycheckActor {
 /// A handle to a cargo process used for fly-checking.
 struct CargoHandle {
     /// The handle to the actual cargo process. As we cannot cancel directly from with
-    /// a read syscall dropping and therefor terminating the process is our best option.
+    /// a read syscall dropping and therefore terminating the process is our best option.
     child: JodChild,
     thread: jod_thread::JoinHandle<io::Result<(bool, String)>>,
     receiver: Receiver<CargoMessage>,

crates/hir-expand/src/lib.rs

@@ -814,7 +814,7 @@ impl<'a> InFile<&'a SyntaxNode> {
 
     pub fn original_syntax_node(self, db: &dyn db::AstDatabase) -> Option<InFile<SyntaxNode>> {
         // This kind of upmapping can only be achieved in attribute expanded files,
-        // as we don't have node inputs otherwise and  therefor can't find an `N` node in the input
+        // as we don't have node inputs otherwise and therefore can't find an `N` node in the input
         if !self.file_id.is_macro() {
             return Some(self.map(Clone::clone));
         } else if !self.file_id.is_attr_macro(db) {
@@ -926,7 +926,7 @@ impl<N: AstNode> InFile<N> {
 
     pub fn original_ast_node(self, db: &dyn db::AstDatabase) -> Option<InFile<N>> {
         // This kind of upmapping can only be achieved in attribute expanded files,
-        // as we don't have node inputs otherwise and  therefor can't find an `N` node in the input
+        // as we don't have node inputs otherwise and therefore can't find an `N` node in the input
         if !self.file_id.is_macro() {
             return Some(self);
         } else if !self.file_id.is_attr_macro(db) {

crates/rust-analyzer/src/config.rs

@@ -157,7 +157,7 @@ config_data! {
         checkOnSave_noDefaultFeatures: Option<bool>      = "null",
         /// Override the command rust-analyzer uses instead of `cargo check` for
         /// diagnostics on save. The command is required to output json and
-        /// should therefor include `--message-format=json` or a similar option.
+        /// should therefore include `--message-format=json` or a similar option.
         ///
         /// If you're changing this because you're using some tool wrapping
         /// Cargo, you might also want to change

crates/syntax/src/tests/sourcegen_ast.rs

@@ -86,7 +86,7 @@ fn generate_nodes(kinds: KindsSrc<'_>, grammar: &AstSrc) -> String {
                 .traits
                 .iter()
                 .filter(|trait_name| {
-                    // Loops have two expressions so this might collide, therefor manual impl it
+                    // Loops have two expressions so this might collide, therefore manual impl it
                     node.name != "ForExpr" && node.name != "WhileExpr"
                         || trait_name.as_str() != "HasLoopBody"
                 })