Bug in FIXED Function

Fix #4889. Function was not outputting correct number of decimals when thousands separator was omitted.

src/PhpSpreadsheet/Calculation/TextData/Format.php

@@ -103,6 +103,13 @@ class Format
                 StringHelper::getDecimalSeparator(),
                 StringHelper::getThousandsSeparator()
             );
+        } else {
+            $valueResult = number_format(
+                $valueResult,
+                $decimals,
+                StringHelper::getDecimalSeparator(),
+                ''
+            );
         }
 
         return (string) $valueResult;

tests/data/Calculation/TextData/FIXED.php

@@ -66,4 +66,6 @@ return [
     'null second argument' => ['123', 123, null],
     'false second argument' => ['123', 123, false],
     'true second argument' => ['123.0', 123, true],
+    'fixed decimals without thousands separator' => ['1507.50', 1507.5, 2, true],
+    'fixed decimals with thousands separator' => ['1,507.50', 1507.5, 2, false],
 ];