Accommodating Slash with preg_quote - Text Functions (#3582)

PR #3513, developed by @SaidkhojaIftikhor, has been stuck for some time awaiting tests. This is the first of three PRs to replace that one. This accomodates the use of slash as a delimiter in functions TEXTAFTER, TEXTBEFORE, TEXTSPLIT, and NUMBERVALUE. The source changes are very simple. Additional tests exercise all the source changes.

tests/data/Calculation/TextData/NUMBERVALUE.php

@@ -51,6 +51,8 @@ return [
     ],
     'no arguments' => ['exception'],
     'boolean argument' => ['#VALUE!', true],
+    'slash as group separator' => [1234567.1, '1/234/567.1', '.', '/'],
+    'slash as decimal separator' => [1234567.1, '1,234,567/1', '/', ','],
     'issue 3574 null string treated as 0' => [0, '', ',', ' '],
     'issue 3574 one or more spaces treated as 0' => [0, '   ', ',', ' '],
     'issue 3574 non-blank numeric string okay' => [2, ' 2 ', ',', ' '],

tests/data/Calculation/TextData/TEXTAFTER.php

@@ -248,4 +248,11 @@ return [
             1,
         ],
     ],
+    'slash delimiter' => [
+        'about/that',
+        [
+            'How/about/that',
+            '/',
+        ],
+    ],
 ];

tests/data/Calculation/TextData/TEXTBEFORE.php

@@ -240,4 +240,11 @@ return [
             1,
         ],
     ],
+    'slash delimiter' => [
+        'How',
+        [
+            'How/about/that',
+            '/',
+        ],
+    ],
 ];

tests/data/Calculation/TextData/TEXTSPLIT.php

@@ -104,4 +104,20 @@ return [
             '',
         ],
     ],
+    'slash as column delimiter' => [
+        [['Hello', 'World']],
+        [
+            'Hello/World',
+            '/',
+            '',
+        ],
+    ],
+    'slash as row delimiter' => [
+        [['ho', 'w'], ['about', '#N/A'], ['t', 'hat']],
+        [
+            'ho.w/about/t.hat',
+            '.',
+            '/',
+        ],
+    ],
 ];