Resolve problem where underscore placeholder in a number format masks (#2038)

* Resolve problem where underscore placeholder in a number format mask was being replaced, but leaving the sizing character as part of the mask

src/PhpSpreadsheet/Style/NumberFormat/Formatter.php

@@ -130,7 +130,7 @@ class Formatter
 
         // In Excel formats, "_" is used to add spacing,
         //    The following character indicates the size of the spacing, which we can't do in HTML, so we just use a standard space
-        $format = preg_replace('/_/ui', ' ', $format);
+        $format = preg_replace('/_.?/ui', ' ', $format);
 
         // Let's begin inspecting the format and converting the value to a formatted string
 

src/PhpSpreadsheet/Style/NumberFormat/NumberFormatter.php

@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 
 class NumberFormatter
 {
@@ -145,7 +146,6 @@ class NumberFormatter
             $format = preg_replace('/0,+/', '0', $format);
             $format = preg_replace('/#,+/', '#', $format);
         }
-
         if (preg_match('/#?.*\?\/\?/', $format, $m)) {
             if ($value != (int) $value) {
                 $value = FractionFormatter::format($value, $format);
@@ -163,7 +163,12 @@ class NumberFormatter
             $n = '/\\[[^\\]]+\\]/';
             $m = preg_replace($n, '', $format);
             if (preg_match(self::NUMBER_REGEX, $m, $matches)) {
+                // There are placeholders for digits, so inject digits from the value into the mask
                 $value = self::formatStraightNumericValue($value, $format, $matches, $useThousands);
+            } elseif ($format !== NumberFormat::FORMAT_GENERAL) {
+                // Yes, I know that this is basically just a hack;
+                //      if there's no placeholders for digits, just return the format mask "as is"
+                $value = str_replace('?', '', $format ?? '');
             }
         }
 

tests/data/Style/NumberFormat.php

@@ -131,7 +131,7 @@ return [
     'Spacing Character' => [
         '826.00  €',
         826,
-        '#,##0.00 _€',
+        '#,##0.00 __€',
     ],
     [
         '5.68',
@@ -263,7 +263,7 @@ return [
     [
         '( 12.30% )',
         -0.123,
-        '_0.00%_;( 0.00% )',
+        '_(0.00%_;( 0.00% )',
     ],
     // Fraction
     [
@@ -374,15 +374,35 @@ return [
         '[$-1010409]#,##0.00;-#,##0.00',
     ],
     [
-        ' ($ 23.06 )',
+        ' $ 23.06 ',
         23.0597,
         '_("$"* #,##0.00_);_("$"* \(#,##0.00\);_("$"* "-"??_);_(@_)',
     ],
     [
-        ' (€ 13.03 )',
-        13.0316,
+        ' € (13.03)',
+        -13.0316,
         '_("€"* #,##0.00_);_("€"* \(#,##0.00\);_("€"* "-"??_);_(@_)',
     ],
+    [
+        ' € 11.70 ',
+        11.7,
+        '_-€* #,##0.00_-;"-€"* #,##0.00_-;_-€* -??_-;_-@_-',
+    ],
+    [
+        '-€ 12.14 ',
+        -12.14,
+        '_-€* #,##0.00_-;"-€"* #,##0.00_-;_-€* -??_-;_-@_-',
+    ],
+    [
+        ' € - ',
+        0,
+        '_-€* #,##0.00_-;"-€"* #,##0.00_-;_-€* -??_-;_-@_-',
+    ],
+    [
+        'test',
+        'test',
+        '_-€* #,##0.00_-;"-€"* #,##0.00_-;_-€* -??_-;_-@_-',
+    ],
     // Named colours
     // Simple color
     [