Merge #2845

2845: Cleanup assert r=kjeremy a=kjeremy

Re: https://github.com/rust-analyzer/rust-analyzer/pull/2841#discussion_r366510725

thanks @bjorn3!

Co-authored-by: kjeremy <kjeremy@gmail.com>

crates/ra_assists/src/assist_ctx.rs

@@ -84,11 +84,7 @@ pub(crate) fn add_assist(
         f: impl FnOnce(&mut AssistBuilder),
     ) -> Option<Assist> {
         let label = AssistLabel { label: label.into(), id };
-        assert_eq!(
-            label.label.chars().nth(0).and_then(|c| Some(c.is_uppercase())).unwrap(),
-            true,
-            "First character should be uppercase"
-        );
+        assert!(label.label.chars().nth(0).unwrap().is_uppercase());
 
         let assist = if self.should_compute_edit {
             let action = {