Fix several style lints (zed-industries/zed#17488)

It's not comprehensive enough to start linting on `style` group, but
hey, it's a start.

Release Notes:

- N/A

src/language_servers/ruby_lsp.rs

@@ -88,7 +88,7 @@ impl RubyLsp {
     pub fn label_for_symbol(&self, symbol: Symbol) -> Option<CodeLabel> {
         let name = &symbol.name;
 
-        return match symbol.kind {
+        match symbol.kind {
             SymbolKind::Method => {
                 let code = format!("def {name}; end");
                 let filter_range = 0..name.len();
@@ -123,6 +123,6 @@ impl RubyLsp {
                 })
             }
             _ => None,
-        };
+        }
     }
 }

src/ruby.rs

@@ -29,15 +29,15 @@ impl zed::Extension for RubyExtension {
     ) -> Result<zed::Command> {
         match language_server_id.as_ref() {
             Solargraph::LANGUAGE_SERVER_ID => {
-                let solargraph = self.solargraph.get_or_insert_with(|| Solargraph::new());
+                let solargraph = self.solargraph.get_or_insert_with(Solargraph::new);
                 solargraph.language_server_command(language_server_id, worktree)
             }
             RubyLsp::LANGUAGE_SERVER_ID => {
-                let ruby_lsp = self.ruby_lsp.get_or_insert_with(|| RubyLsp::new());
+                let ruby_lsp = self.ruby_lsp.get_or_insert_with(RubyLsp::new);
                 ruby_lsp.language_server_command(language_server_id, worktree)
             }
             Rubocop::LANGUAGE_SERVER_ID => {
-                let rubocop = self.rubocop.get_or_insert_with(|| Rubocop::new());
+                let rubocop = self.rubocop.get_or_insert_with(Rubocop::new);
                 rubocop.language_server_command(language_server_id, worktree)
             }
             language_server_id => Err(format!("unknown language server: {language_server_id}")),