Fix undefined array key in Syllables by normalizing whitespace before explode

[Copilot]

averageSyllablesPerWord() and wordsWithThreeSyllables() iterated up to Text::wordCount() (which collapses \s+ → single space internally) but split via explode(' ', $strText) — meaning inputs with \n, \t, or \r\n produced fewer array elements than the loop bound, triggering "Undefined array key" warnings.

Changes

• Syllables.php — normalize whitespace in both affected methods before explode, aligning the split with wordCount's behavior:

  $strText = preg_replace('/\s+/', ' ', trim($strText));
  $arrWords = explode(' ', $strText);

• TextStatisticsTest.php — regression assertions confirming \n, \t, and \n\n separators produce identical results to space-separated input for both averageSyllablesPerWord and wordsWithThreeSyllables.

Warning

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