chore: fix rules check snippet to emit an error code

crates/biome_analyze/src/lib.rs

@@ -921,12 +921,12 @@ pub enum Never {}
 
 /// Type alias of [ops::ControlFlow] with the `B` generic type defaulting to [Never]
 ///
-/// By default the analysis loop never breaks, so it behaves mostly like
+/// By default, the analysis loop never breaks, so it behaves mostly like
 /// `let b = loop {};` and has a "break type" of `!` (the `!` type isn't stable
-/// yet so I'm using an empty enum instead but they're identical for this
+/// yet, so I'm using an empty enum instead, but they're identical for this
 /// purpose)
 ///
-/// In practice it's not really a `loop` but a `for` because it's iterating on
+/// In practice, it's not really a `loop` but a `for` because it's iterating on
 /// all nodes in the syntax tree, so when it reaches the end of the iterator
 /// the loop will exit but without producing a value of type `B`: for this
 /// reason the `analyze` function returns an `Option<B>` that's set to

crates/biome_js_analyze/src/lint/nursery/no_irregular_whitespace.rs

@@ -13,18 +13,18 @@ const IRREGULAR_WHITESPACES: &[char; 22] = &[
 declare_lint_rule! {
     /// Disallows the use of irregular whitespace characters.
     ///
-    /// Invalid or irregular whitespace causes issues with ECMAScript 5 parsers and also makes code harder to debug.
+    /// Invalid or irregular whitespace causes issues with various parsers and also makes code harder to debug.
     ///
     /// ## Examples
     ///
     /// ### Invalid
     ///
     /// ```js,expect_diagnostic
-    /// constcount=1;
+    /// constcount;
     /// ```
     ///
     /// ```js,expect_diagnostic
-    /// const foo = 'thing';
+    /// const foo;
     /// ```
     ///
     /// ### Valid
@@ -67,6 +67,9 @@ impl Rule for NoIrregularWhitespace {
                     "Irregular whitespaces found."
                 },
             )
+            .note(markup!{
+                "Irregular whitespaces can cause issues to other parsers, and make the code harder to debug."
+            })
             .note(markup! {
                 "Replace the irregular whitespaces with normal whitespaces or tabs."
             }),