Standardise Getting Started example indentation

[timacdonald]

There is inconsistent indentation within the "Getting started" section of the docs including the same example across different pages.

I feel that using 4 spaces is pretty established indentation in the PHP community and should be our standard within the docs.

This example:

is then repeated on different pages in the same section with different indentation.

Result

[TimWolla]

I agree this is an improvement. Probably https://www.php.net/manual/en/tutorial.forms.php should also be updated, though.

[timacdonald]

@TimWolla I've pushed changes for that example.

[TimWolla]

I've pushed a small fix to drop trailing whitespace (that wasn't your fault, but was exposed due to the change to the line) and then merged. Thank you!

[timacdonald]

Appreciate it!