change display_error.exit_code to false (#13873)

The idea comes from @amtoine, I think it would be good to keey
`display_error.exit_code` same value, if user is using default config or
using no config file at all.

crates/nu-command/tests/commands/do_.rs

@@ -9,25 +9,28 @@ fn capture_errors_works() {
     assert!(actual.err.contains("column_not_found"));
 }
 
+// TODO: need to add tests under display_error.exit_code = true
 #[test]
 fn capture_errors_works_for_external() {
     let actual = nu!("do -c {nu --testbin fail}");
-    assert!(actual.err.contains("exited with code"));
-    assert_eq!(actual.out, "");
+    assert!(!actual.status.success());
+    assert!(!actual.err.contains("exited with code"));
 }
 
+// TODO: need to add tests under display_error.exit_code = true
 #[test]
 fn capture_errors_works_for_external_with_pipeline() {
     let actual = nu!("do -c {nu --testbin fail} | echo `text`");
-    assert!(actual.err.contains("exited with code"));
-    assert_eq!(actual.out, "");
+    assert!(!actual.status.success());
+    assert!(!actual.err.contains("exited with code"));
 }
 
+// TODO: need to add tests under display_error.exit_code = true
 #[test]
 fn capture_errors_works_for_external_with_semicolon() {
     let actual = nu!(r#"do -c {nu --testbin fail}; echo `text`"#);
-    assert!(actual.err.contains("exited with code"));
-    assert_eq!(actual.out, "");
+    assert!(!actual.status.success());
+    assert!(!actual.err.contains("exited with code"));
 }
 
 #[test]

crates/nu-protocol/src/config/display_errors.rs

@@ -22,7 +22,7 @@ impl DisplayErrors {
 impl Default for DisplayErrors {
     fn default() -> Self {
         Self {
-            exit_code: true,
+            exit_code: false,
             termination_signal: true,
         }
     }

tests/shell/pipeline/commands/external.rs

@@ -627,16 +627,18 @@ fn exit_code_stops_execution_closure() {
     assert!(actual.err.contains("exited with code 1"));
 }
 
+// TODO: need to add tests under display_error.exit_code = true
 #[test]
 fn exit_code_stops_execution_custom_command() {
     let actual = nu!("def cmd [] { nu -c 'exit 42'; 'ok1' }; cmd; print 'ok2'");
     assert!(actual.out.is_empty());
-    assert!(actual.err.contains("exited with code 42"));
+    assert!(!actual.err.contains("exited with code 42"));
 }
 
+// TODO: need to add tests under display_error.exit_code = true
 #[test]
 fn exit_code_stops_execution_for_loop() {
     let actual = nu!("for x in [0 1] { nu -c 'exit 42'; print $x }");
     assert!(actual.out.is_empty());
-    assert!(actual.err.contains("exited with code 42"));
+    assert!(!actual.err.contains("exited with code 42"));
 }