Allow comments in match blocks (#11717)

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# Description
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Fix #9878 

# User-Facing Changes
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helps us keep track of breaking changes. -->
Writing comments in match blocks will be allowed.

# Tests + Formatting
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crates/nu-command/tests/commands/match_.rs

@@ -1,4 +1,6 @@
 use nu_test_support::nu;
+use nu_test_support::playground::Playground;
+use std::fs;
 
 #[test]
 fn match_for_range() {
@@ -226,3 +228,40 @@ fn match_with_guard_no_expr_after_if() {
 
     assert!(actual.err.contains("Match guard without an expression"));
 }
+
+#[test]
+fn match_with_comment_1() {
+    Playground::setup("match_with_comment", |dirs, _| {
+        let data = r#"
+match 1 {
+    # comment
+    _ => { print 'success' }
+}
+            "#;
+        fs::write(dirs.root().join("match_test"), data).expect("Unable to write file");
+        let actual = nu!(
+            cwd: dirs.root(),
+            "source match_test"
+        );
+
+        assert_eq!(actual.out, "success");
+    });
+}
+
+#[test]
+fn match_with_comment_2() {
+    Playground::setup("match_with_comment", |dirs, _| {
+        let data = r#"
+match 1 {
+    _ => { print 'success' } # comment
+}
+            "#;
+        fs::write(dirs.root().join("match_test"), data).expect("Unable to write file");
+        let actual = nu!(
+            cwd: dirs.root(),
+            "source match_test"
+        );
+
+        assert_eq!(actual.out, "success");
+    });
+}

crates/nu-parser/src/parser.rs

@@ -4177,7 +4177,7 @@ pub fn parse_match_block_expression(working_set: &mut StateWorkingSet, span: Spa
 
     let source = working_set.get_span_contents(inner_span);
 
-    let (output, err) = lex(source, start, &[b' ', b'\r', b'\n', b',', b'|'], &[], false);
+    let (output, err) = lex(source, start, &[b' ', b'\r', b'\n', b',', b'|'], &[], true);
     if let Some(err) = err {
         working_set.error(err);
     }