Write a `.gitignore` pattern that ignores all files ending with `.temp` *exceptfor a file named `important.temp` in the same directory.

To achieve the desired behavior, the `.gitignore` file should contain two patterns. The `.gitignore` file is a plain text file that specifies intentionally untracked files that Git should ignore. Files specified in `.gitignore` are not included in the repository and are not shown in Git's status output. Git processes these patterns to determine which files to exclude from its tracking system.

The first pattern is `*.temp`. The asterisk `*` is a wildcard character that matches zero or more characters. This pattern instructs Git to ignore any file name that ends with the `.temp` suffix, regardless of what precedes it. For example, `file.temp`, `another_file.temp`, and `log.temp` would all be ignored by this pattern.

The second pattern is `!important.temp`. The exclamation mark `!` at the beginning of a pattern negates a previously matched pattern. This means that if a file was ignored by an earlier pattern in the `.gitignore` file, or by a pattern in a parent directory's `.gitignore` file, the negation pattern re-includes it, making Git trackable again. This specific pattern explicitly unignores the file named `important.temp`. Since the `important.temp` file resides in the same directory where this `.gitignore` file is placed, or within its scope if the `.gitignore` is in a parent directory, this direct filename match is effective.

When Git evaluates the `.gitignore` file, it processes the patterns sequentially. First, it encounters `*.temp`, which marks all files ending in `.temp` as ignored. Then, it encounters `!important.temp`. Because this is a negation pattern that explicitly matches `important.temp`, and it appears after the general ignore rule, it overrides the general rule for this specific file. Therefore, `important.temp` will not be ignored, while all other files ending in `.temp` will be ignored.