[Eljees]

Fixes #803.

pStmts() is used as the plain (non-format-preserving) fallback printer for a
statement list whenever the containing node doesn't have a usable origNode
attribute — for example when an unrelated ancestor node was replaced, as in
the reproduction from #803 (wrapping an existing class into
return new class extends X { ... };). It always inserted a single newline
between statements, even when $this->origTokens was available and the
individual statements themselves still carried valid origNode attributes
(so their own bodies were still being format-preserved). This silently
dropped any blank line that used to separate two such statements.

Reproduction (before this patch)

$code = <<<'EOC'
<?php

class Foo extends Migration
{
    public function up()
    {
        //
    }

    public function down()
    {
        //
    }
}

EOC;
// ... parse $code with token tracking, clone via CloningVisitor ...
$newStmts[0] = new Return_(new New_($classNode)); // wrap existing class

echo (new Standard)->printFormatPreserving($newStmts, $oldStmts, $oldTokens);

Output before the fix (blank line between up() and down() lost):

<?php

return new class extends Migration
{
    public function up()
    {
        //
    }
    public function down()
    {
        //
    }
};

Fix

pStmts() now checks, for each pair of consecutive statements that both
still carry a valid origNode attribute, whether the original source text
between them (via $this->origTokens) is pure whitespace containing a blank
line — and if so, re-inserts it. If anything else used to sit between them
(another statement that was removed, inline HTML, a comment), the existing
single-newline behavior is kept, since a raw line-number gap alone doesn't
tell us a blank line was actually there (this distinction is covered by the
existing inlineHtml.test fixtures, which continue to pass unchanged).

Added test/code/formatPreservation/blankLineBetweenMethods.test,
reproducing the exact scenario from #803.

Testing

vendor/bin/phpunit — 1923 tests, 2797 assertions, all passing (previously
1922/1922 on master; the added test failed for the documented reason
before the fix and passes after it). No other test's expected output
changed.

Signed-off-by: Eljees 3.14hell@gmail.com