Fix docblock indentation loss when fixing empty enclosing line

[dereuromark]

Summary

• Fixed a bug where EmptyEnclosingLineSniff caused docblock indentation to be lost when combined with other fixers

Problem

When processing a file with tabs and an empty line after a class opening brace, running phpcbf with the full PhpCollective ruleset caused the first content (typically a docblock) to lose its indentation entirely.

Input:

class Example {

	/**
	 * @param string $foo
	 */
	public function test(string $foo): void {

Before fix (incorrect):

class Example
{
/**
 * @param string $foo
 */
    public function test(string $foo): void

After fix (correct):

class Example
{
    /**
     * @param string $foo
     */
    public function test(string $foo): void

Root Cause

The EmptyEnclosingLineSniff removed all tokens between the opening brace and the first content line, including the newline that should remain. When combined with Generic.WhiteSpace.DisallowTabIndent (which converts tabs to spaces), the fixer loop interactions caused the indentation token to be lost.

Solution

The fix explicitly preserves one newline after the opening brace by:

1. Replacing the first token after the brace with a newline character
2. Removing the remaining tokens up to (but not including) the indentation of the content line

All existing tests pass.