Relax stack trace errors

Different versions of Python give slightly different stack traces. The
tests were passing with Python 3.10, but failing with Python 3.13. This
commit relaxes the checks to look for the most important telltales,
rather than being rigid about the complete stack trace contents.

Author: ctrueden

src/test/java/org/apposed/appose/ApposeTest.java

@@ -161,13 +161,8 @@ public void testTaskFailurePython() throws InterruptedException, IOException {
 			task.waitFor();
 			assertSame(TaskStatus.FAILED, task.status);
 			String nl = "(\r\n|\n|\r)";
-			String expectedError =
-				"Traceback \\(most recent call last\\):" + nl +
-				"  File \"[^ ]*python_worker.py\", line \\d+, in execute_script" + nl +
-				"    result = eval\\(" + nl +
-				"  File \"<string>\", line 1, in <module>" + nl +
-				"NameError: name 'whee' is not defined" + nl;
-			assertTrue(task.error.matches(expectedError));
+			String expectedError = "NameError: name 'whee' is not defined";
+			assertTrue(task.error.contains(expectedError));
 		}
 	}
 
@@ -182,14 +177,12 @@ public void testStartupCrash() throws InterruptedException, IOException {
 			Thread.sleep(5);
 		}
 		assertFalse(service.isAlive());
-		assertEquals(3, service.errorLines().size());
 		// Check that the crash happened and was recorded correctly.
-		List<String> expectedLines = Arrays.asList(
-			"Traceback (most recent call last):",
-			"  File \"<string>\", line 1, in <module>",
-			"ModuleNotFoundError: No module named 'nonexistentpackage'"
-		);
-		assertEquals(expectedLines, service.errorLines());
+		List<String> errorLines = service.errorLines();
+		assertNotNull(errorLines);
+		assertFalse(errorLines.isEmpty());
+		String error = errorLines.get(errorLines.size() - 1);
+		assertEquals("ModuleNotFoundError: No module named 'nonexistentpackage'", error);
 	}
 
 	@Test