Code Duplication    Length = 6-6 lines in 2 locations

src/PhpSpreadsheet/Reader/Xls.php 2 locations

@@ 5387-5392 (lines=6) @@
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                    break;
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                case 'tUplus': // unary plus
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                case 'tUminus': // unary minus
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                    $op = array_pop($formulaStrings);
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                    $formulaStrings[] = "$space1$space0{$token['data']}$op";
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                    unset($space0, $space1);
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                    break;
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                case 'tPercent': // percent sign
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                    $op = array_pop($formulaStrings);
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                    $formulaStrings[] = "$op$space1$space0{$token['data']}";
@@ 5393-5398 (lines=6) @@
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                    unset($space0, $space1);
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                    break;
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                case 'tPercent': // percent sign
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                    $op = array_pop($formulaStrings);
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                    $formulaStrings[] = "$op$space1$space0{$token['data']}";
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                    unset($space0, $space1);
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                    break;
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                case 'tAttrVolatile': // indicates volatile function
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                case 'tAttrIf':
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                case 'tAttrSkip':