Don't trim in Comment::getReformattedText()

In the past, single-line comments were stored together with the
trailing newline. Later we switched to the PHP8 comment
representation, where the trailing newline is not part of the
comment anymore. As such, there is also no need to trim here.

This is split out from GH-867.

Author: nikic

lib/PhpParser/Comment.php

@@ -150,7 +150,7 @@ public function __toString() : string {
      * @return mixed|string
      */
     public function getReformattedText() {
-        $text = trim($this->text);
+        $text = $this->text;
         $newlinePos = strpos($text, "\n");
         if (false === $newlinePos) {
             // Single line comments don't need further processing

test/PhpParser/CommentTest.php

@@ -31,7 +31,7 @@ public function testReformatting($commentText, $reformattedText) {
 
     public function provideTestReformatting() {
         return [
-            ['// Some text' . "\n", '// Some text'],
+            ['// Some text', '// Some text'],
             ['/* Some text */', '/* Some text */'],
             [
                 '/**

test/code/formatPreservation/classMethodNop.test

@@ -65,7 +65,7 @@ class Foo {
     }
 }
 -----
-$stmts[0]->stmts[0]->stmts[0]->setAttribute('comments', [new Comment("// I'm a new comment\n")]);
+$stmts[0]->stmts[0]->stmts[0]->setAttribute('comments', [new Comment("// I'm a new comment")]);
 -----
 <?php
 class Foo {
@@ -74,4 +74,4 @@ class Foo {
         // I'm a new comment
 
     }
-}
+}