[BUG] [LSP] Codeblock after escaping sequences get an unterminated backtick identifier error

[martinvuyk]

Bug description

This happens in the nightly branch in StringSlice.strip()

CC: @walter-erquinigo

Steps to reproduce

fn strip(self) -> Self:
    """Return a copy of the string with leading and trailing whitespaces
    removed. This only takes ASCII whitespace into account:
    `" \\t\\n\\v\\f\\r\\x1c\\x1d\\x1e"`.

    Returns:
        A copy of the string with no leading or trailing whitespaces.

    Examples:

    ```mojo
    print("  mojo  ".strip()) # "mojo"
    ```
    .
    """
    return self.lstrip().rstrip()

System information

- Provide version information for Mojo by pasting the output of `mojo -v`
`mojo 25.1.0.dev2024121705`