fix(awk): close range when start and end match same record

crates/bashkit/src/builtins/awk.rs

@@ -3341,7 +3341,9 @@ impl AwkInterpreter {
                 } else {
                     // Not in range — check if start pattern matches
                     if self.matches_pattern(start) {
-                        self.range_active.insert(rule_idx, true);
+                        // If end also matches this same line, range closes immediately.
+                        let end_matches = self.matches_pattern(end);
+                        self.range_active.insert(rule_idx, !end_matches);
                         true
                     } else {
                         false

crates/bashkit/tests/awk_range_pattern_tests.rs

@@ -95,3 +95,14 @@ async fn awk_range_pattern_default_action() {
         .unwrap();
     assert_eq!(result.stdout, "a\nb\nc\n");
 }
+
+/// Start/end matching same record should only match that single record.
+#[tokio::test]
+async fn awk_range_pattern_start_end_same_line() {
+    let mut bash = Bash::new();
+    let result = bash
+        .exec(r#"printf "a\nb\na\nc\n" | awk '/a/,/a/{print}'"#)
+        .await
+        .unwrap();
+    assert_eq!(result.stdout, "a\na\n");
+}