[5.8] Fix adding extra space/line that breaks content

[bzixilu]

The pull-request contains the fix for #27996

The main idea is to remove extra line break related to the added path comment during view rendering.
This fix should not affect any line breaks which doesn't relate to added path comment.

I personally don't like the following things in the fix.

1. If we change a form which is used to represent a path in compiled view, we should not forget to fix a rendering as well (I couldn't write a test for it, it looked quite complicated)

2. Totally we pass through a view 2 times, the first time when including the compiled view, and the second time when checking if it ends with path comment, probably it could be optimized and done with a single pass.

I appreciate if you could advise me how to improve it.

[taylorotwell]

I'm not sure this is worth fixing? Should one blade component really be dependent on there not being any space rendered after another Blade component?

[fitztrev]

@taylorotwell IMO yes - here's the simplest illustration why:

This blade code renders a partial with an inline element:

@each('widget', $widgets, 'widget')

Before 5.8:

Since 5.8:

There are times when whitespace in HTML matters.

[taylorotwell]

Rather than wrangling around with the file contents themselves, maybe there is a simpler way to approach this? Could we encode the original file path in the cached file path, perhaps where the cached file path is a base64_encoded version of the original file path? Or some approach like that. For now, I have disabled this feature on 5.8.

[taylorotwell]

Closing since #28117 was merged.