Hoping for progress on this for comments and php open tag issues. Details here:
#5019 (comment)

This PR is now small enough to be reviewed directly IMO.

Thanks for the split 👍 It will be helfpul in narrowing down changes and bugs!

It seems this split broke indent of catch/switch. I tried the latest 3.9.x and these worked.
How should I setup the rules to keep the original behavior?

-switch ($simple) {\n
+switch($simple) {\n

-} catch (FirstThrowableType $e) {\n
+} catch(FirstThrowableType $e) {\n

 new class($a, $b, $c) extends SomeExtendedClass implements\n
     \ArrayAccess,\n
     \Countable {\n
-        // Body\n
-    };\n
+    // Body\n
+};\n

Allright, add SingleSpaceAfterConstructFixer solves first 2 cases 👍 🙂

@TomasVotruba Third case looks expected though.

@julienfalque I see people complaining PSR12 set is now broken :) How can I make it 3.9 compatible?
Or is it a bugfix?

@TomasVotruba Please submit an issue with details regarding what is broken.

@julienfalque
I found a bug in the following:

<?php
    class Foo
    {
    public function test()
    { 
    }
    }

it will be fixed before v3.10.0, but it doesn't fix now.

This PR is big change, so I not found where line has a problem

@julienfalque I found a bug in the following:

<?php
    class Foo
    {
    public function test()
    { 
    }
    }

it will be fixed before v3.10.0, but it doesn't fix now.

This PR is big change, so I not found where line has a problem

src/Fixer/Basic/CurlyBracesPositionFixer.php

@kayw-geek , would you mind to open new issue and link this PR? not so many ppl are watching the closed issues/PRs

First of all, thank you very much for your great work.
My Question is, with the new changes, is there a rule to keep empty spaces inside control structures? It is mentioned in #4487

No, the rules created during this refactoring only cover existing behaviour of braces.

But if you will pay attention to comment #4487? This comment is already 3 years old, please, this functionality is necessary to improve the code's readability.

I don't believe we ever provided this feature, and it's not related to split of Braces fixer. if you would like to provide such feature, please show it's needed by given community [eg some big open source project/framework] and propose a PR for it, thanks !