Ignore cell formatting when the format is a single @

This commit fix two issues that happened when the a cell was formatted as text
* When the cell contains a number prefixed with dollar sign, this number is getting replaced with 0. The replacement happens due to the preg_replace function.
* When the cell contains quotes, the quote would be removed.

CHANGELOG.md

@@ -25,7 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Fixed
 
-- Nothing yet.
+- Ignore cell formatting when the format is a single @. [Issue #4242](https://github.com/PHPOffice/PhpSpreadsheet/issues/4242) [PR #4243](https://github.com/PHPOffice/PhpSpreadsheet/pull/4243)
 
 ## 2024-11-22 - 3.5.0
 

src/PhpSpreadsheet/Style/NumberFormat/Formatter.php

@@ -126,7 +126,13 @@ public static function toFormattedString($value, string $format, ?array $callBac
         // For now we do not treat strings in sections, although section 4 of a format code affects strings
         // Process a single block format code containing @ for text substitution
         if (preg_match(self::SECTION_SPLIT, $format) === 0 && preg_match(self::SYMBOL_AT, $format) === 1) {
-            return str_replace('"', '', preg_replace(self::SYMBOL_AT, (string) $value, $format) ?? '');
+            if (!str_contains($format, '"')) {
+                return str_replace('@', $value, $format);
+            }
+            //escape any dollar signs on the string, so they are not replaced with an empty value
+            $value = str_replace('$', '\\$', (string) $value);
+
+            return str_replace('"', '', preg_replace(self::SYMBOL_AT, $value, $format) ?? $value);
         }
 
         // If we have a text value, return it "as is"

tests/data/Style/NumberFormat.php

@@ -1682,4 +1682,24 @@
         '#,##0.00;;"---"',
     ],
     'issue 4124' => ['1 HUF', 1, '#,##0_-[$HUF]'],
+    'issue 4242-0' => [
+        'General $200 - 200', // expected result
+        'General $200 - 200', // cell contents
+        NumberFormat::FORMAT_GENERAL, // cell style
+    ],
+    'issue 4242-1' => [
+        'Text $200 - 200',
+        'Text $200 - 200',
+        NumberFormat::FORMAT_TEXT,
+    ],
+    'issue 4242-2' => [
+        '"Hello" she said and "Hello" I replied',
+        '"Hello" she said and "Hello" I replied',
+        NumberFormat::FORMAT_TEXT,
+    ],
+    'issue 4242-3' => [
+        'Text: $200 - 200',
+        '$200 - 200',
+        '"Text: "' . NumberFormat::FORMAT_TEXT,
+    ],
 ];