add option showHeader

[vendeeglobe]

HTML Inline Renderer -> Options

Name	Type	Default	Description
showHeader	bool	true	Generation of the table header.

https://github.com/JBlond/php-diff/wiki/2.-Parameters-and-Options

[DigiLive]

@vendeeglobe Thanks for your effort.

1. jblond\Diff\Renderer\Html\Merged has method generateDiffHeader() also.
   Shouldn't the changes be included into this class also?
2. Maybe the option should be refactored to something like addTableHeader since code is generated, but not shown by the class.
3. We shouldn't forget to update the Wiki once merged.

@JBlond Did you read my email?

[JBlond]

I don't like this change. In the discussion You (@vendeeglobe) mentioned jfcherng/php-diff@5f0dd2d
There is a clean stop

if (!$this->options['showHeader']) {
            return '';
        }

This patch on the other hand only tries to change some of the code. It is a cleaner option to extend the desired class and override a single method. See https://github.com/JBlond/php-diff/wiki/3.-Custom-Renderer

[JBlond]

This is not a clean solution.

[DigiLive]

JBlond wrote:

I don't like this change.

I vote for what I offered at issue #53 (comment)

IMHO overriding is the cleanest and most versatile way to generate custom output, based on a current renderer.
I'm not saying the request of vendeeglobe is invalid, but It's unmanageable for us to implement each and every requests for custom output.

However, I do appreciate his usage of our package and the feedback he gives us.
I'm willing to help him to implement the suggested overrides.
We can discuss it at https://github.com/JBlond/php-diff/discussions if he pleases so.

[JBlond]

@vendeeglobe is that an option for you that DigiLive helps you to make that changes in your repo?

[JBlond]

There wasn't any feedback within two weeks. Please add another commend, if you want to contiune.