chore(MigrateDumpCommand): Tolerate whitespace between comma and quote of migration rows.

Author: Paul Rogers

src/Commands/MigrateDumpCommand.php

@@ -62,8 +62,10 @@ private static function reorderMigrationRows(array $output) : array
             $reordered = [];
             $new_id = 1;
             foreach ($output as $line) {
+                // Extract parts of "INSERT ... VALUES ([id],'[ver]',[batch])
+                // where version begins with "YYYY_MM_DD_HHMMSS".
                 $occurrences = preg_match(
-                    "/^(.*?VALUES\s*)\([0-9]+,'([0-9_]{17})(.*?),\s*[0-9]+\s*\)\s*;\s*$/iu",
+                    "/^(.*?VALUES\s*)\([0-9]+,\s*'([0-9_]{17})(.*?),\s*[0-9]+\s*\)\s*;\s*$/iu",
                     $line,
                     $m
                 );
@@ -72,6 +74,8 @@ private static function reorderMigrationRows(array $output) : array
                         'Only insert rows supported:' . PHP_EOL . var_export($line, 1)
                     );
                 }
+                // Reassemble parts with new values and index by timestamp of
+                // version string to sort.
                 $reordered[$m[2]] = "$m[1]($new_id,'$m[2]$m[3],0);";
                 $new_id += 1;
             }