You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: space_character.rs
    path of file: ./repos/dotenv-linter/dotenv-linter/tests/fixes
    
    the code of the file until where you have to start completion: use crate::common::*;

#[test]
fn space_character() {
    let testdir = TestDir::new();
    let testfile = testdir.create_testfile(".env", "ABC = DEF\n\nFOO= BAR\n");
    let expected_output = fix_output(&[(
        ".env",
        &[
            ".env:1 SpaceCharacter: The line has spaces around equal sign",
            ".env:3 SpaceCharacter: The line has spaces around eq
    
fn space_character() {
    let testdir = TestDir::new();
    let testfile = testdir.create_testfile(".env", "ABC = DEF\n\nFOO= BAR\n");
    let expected_output = fix_output(&[(
        ".env",
        &[
            ".env:1 SpaceCharacter: The line has spaces around equal sign",
            ".env:3 SpaceCharacter: The line has spaces around equal sign",
        ],
    )]);
    testdir.test_command_fix_success(expected_output);

    assert_eq!(testfile.contents().as_str(), "ABC=DEF\n\nFOO=BAR\n");

    testdir.close();
}