bug symfony#61501 [Console] Fix testing multiline question (MatTheCat)

This PR was merged into the 6.4 branch.

Discussion
----------

[Console] Fix testing multiline question

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix symfony#58910
| License       | MIT

Commits
-------

b08751e [Console] Fix testing multiline question

Author: fabpot

src/Symfony/Component/Console/Helper/QuestionHelper.php

@@ -527,12 +527,16 @@ private function readInput($inputStream, Question $question): string|false
         $ret = '';
         $cp = $this->setIOCodepage();
         while (false !== ($char = fgetc($multiLineStreamReader))) {
-            if (\PHP_EOL === "{$ret}{$char}") {
+            if ("\x4" === $char || \PHP_EOL === "{$ret}{$char}") {
                 break;
             }
             $ret .= $char;
         }
 
+        if (stream_get_meta_data($inputStream)['seekable']) {
+            fseek($inputStream, ftell($multiLineStreamReader));
+        }
+
         return $this->resetIOCodepage($cp, $ret);
     }
 

src/Symfony/Component/Console/Tester/TesterTrait.php

@@ -169,6 +169,10 @@ private static function createStream(array $inputs)
 
         foreach ($inputs as $input) {
             fwrite($stream, $input.\PHP_EOL);
+
+            if (str_contains($input, \PHP_EOL)) {
+                fwrite($stream, "\x4");
+            }
         }
 
         rewind($stream);

src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php

@@ -519,7 +519,7 @@ public function testAskMultilineResponseWithWithCursorInMiddleOfSeekableInputStr
         $question->setMultiline(true);
 
         $this->assertSame("some\ninput", $dialog->ask($this->createStreamableInputInterfaceMock($response), $this->createOutputInterface(), $question));
-        $this->assertSame(8, ftell($response));
+        $this->assertSame(18, ftell($response));
     }
 
     /**