Fix Running echo .. starts printing integers forever (#3322)

tests/shell/pipeline/commands/internal.rs

@@ -433,6 +433,30 @@ fn index_cell_alt() {
     assert_eq!(actual.out, "bob");
 }
 
+#[test]
+fn not_echoing_ranges_without_numbers() {
+    let actual = nu!(
+        cwd: ".",
+        r#"
+            echo ..
+        "#
+    );
+
+    assert_eq!(actual.out, "..");
+}
+
+#[test]
+fn not_echoing_exclusive_ranges_without_numbers() {
+    let actual = nu!(
+        cwd: ".",
+        r#"
+            echo ..<
+        "#
+    );
+
+    assert_eq!(actual.out, "..<");
+}
+
 #[test]
 fn echoing_ranges() {
     let actual = nu!(