Fix typo

in description of 'isMark'

Author: guntbert

docs/modules.html

@@ -423,7 +423,7 @@ <h1>Modules</h1>
 <p><span class="label function">isOctDigit</span> checks whether a character is an octal digit.</p>
 <p><span class="label function">isHexDigit</span> checks whether a character is a hex digit.</p>
 <p><span class="label function">isLetter</span> checks whether a character is a letter.</p>
-<p><span class="label function">isMark</span> checks for Unicode mark characters. Those are characters that combine with preceding letters to form latters with accents. Use this if you are French.</p>
+<p><span class="label function">isMark</span> checks for Unicode mark characters. Those are characters that combine with preceding letters to form letters with accents. Use this if you are French.</p>
 <p><span class="label function">isNumber</span> checks whether a character is numeric.</p>
 <p><span class="label function">isPunctuation</span> checks whether a character is punctuation.</p>
 <p><span class="label function">isSymbol</span> checks whether a character is a fancy mathematical or currency symbol.</p>