crawlerStatsHelper.begin(key);
        crawlerStatsHelper.record(key, "action\twith\ttabs");
        crawlerStatsHelper.done(key);

        String logMessage = localLogMsg.get();
        assertTrue(logMessage.contains("action with tabs:"));
        assertFalse(logMessage.contains("action\twith\ttabs:"));
    }

    @Test
    public void test_unsupportedKeyType() {
        Object key = new Object();

{* ../../docs_src/websockets_/tutorial003_py310.py hl[79:81] *}

To try it out:

* Open the app with several browser tabs.
* Write messages from them.
* Then close one of the tabs.

That will raise the `WebSocketDisconnect` exception, and all the other clients will receive a message like:

```
Client #1596980209979 left the chat
```

/// tip

works(foo="bar")  # This works 🎉
```

...and that's it.

////

//// tab | Info

Code in code blocks should not be modified, with the exception of comments.

See section `### Content of code blocks` in the general prompt in `scripts/translate.py`.

////

## Tabs and colored boxes { #tabs-and-colored-boxes }

//// tab | Test

/// info
Some text
///

/// note
Some text
///

                                                           data-toggle="tab"><la:message
                                        key="labels.plugin_local_install"
                                /></a></li>
                            </ul>
                            <div class="tab-content">
                                <div role="tabpanel" class="tab-pane active" id="remote">

        assertTrue(result.contains("content"));
        assertTrue(result.contains("newlines"));
        assertTrue(result.contains("tabs"));
        // JSON should be properly escaped
        assertTrue(result.contains("Test"));
    }

    @Test
    public void test_toSlackMessage_withWhitespaceContent() {
        MockSMailPostingDiscloser discloser = new MockSMailPostingDiscloser();

[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; }

die() {
  printf %s\\n "$1" >&2
  exit 1
}

trim() {
  # MWRAPPER-139:
  #   Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds.
  #   Needed for removing poorly interpreted newline sequences when running in more
  #   exotic environments such as mingw bash on Windows.
  printf "%s" "${1}" | tr -d '[:space:]'
}

---

## Code Conventions

### Java Style

- **Formatter**: Eclipse formatter at `src/config/eclipse/formatter/java.xml`
- **Indentation**: 4 spaces (no tabs)
- **Line Length**: 140 characters max
- **License Headers**: Required (use `mvn license:format`)

### Naming & Style

mvn test                       # Run tests
mvn formatter:format           # Format code
mvn license:format             # Update license headers
```

### Code Style

- 4 spaces (no tabs), opening brace on same line, max line length 120
- JavaDoc required for public APIs
- License headers required (Apache 2.0)

### Testing

- **Structure**: `src/test/java/org/codelibs/fess/crawler/`

    * You can normally quickly detect it by going to the "Files changed" tab in the PR and checking if the updated file(s) starts with `docs/en/docs`. The original version of the docs is always in English, so in `docs/en/docs`.
* `lang-all`: Translations

    "UP",  # pyupgrade
]
ignore = [
    "E501",  # line too long, handled by black
    "B008",  # do not perform function calls in argument defaults
    "C901",  # too complex
    "W191",  # indentation contains tabs
]

[tool.ruff.lint.per-file-ignores]
"__init__.py" = ["F401"]
"docs_src/custom_request_and_route/tutorial002_an_py310.py" = ["B904"]
"docs_src/custom_request_and_route/tutorial002_an_py39.py" = ["B904"]