small fixes in the deirab/unmark routine

.quran.js

@@ -3,10 +3,10 @@ const aayaat_logic = (function () {
 const unmark = (phrase) => phrase
   // remove mosħaf formatting signs
   .r(/\xa0\u06dd[٠-٩]+(?:\xa0\u06e9)?/, '')  // ayah number & sajda if any
-  .r(/\u06de\xa0/,       '')   // start of rub el hizb if found
-  .r(/[\u06D6-\u06DC] /, '')   // waqf signs
-  .r(/\u0305/g,          '')   // combining overline
-  .r(/^(.)\u0651/g,      '$1') // initial shadda-of-idgham
+  .r(/\u06de\xa0/,           '')    // start of rub el hizb if found
+  .r(/[\u06D6-\u06DC] /,     '')    // waqf signs
+  .r(/\u0305/g,              '')    // combining overline
+  .r(/^(.)\u0651/g,          '$1')  // initial shadda-of-idgham
   // remove final tashkeel signs (except shadda)
   .r(/[\u06e4-\u06e6]+$/g,   '')    // madd-monfasel & madd sela
   .r(/\u06e1$/,              '')    // jazm (quranic sukun)
@@ -15,11 +15,15 @@ const unmark = (phrase) => phrase
   .r(/[\u08f1\u08f2]$/,      '')    // open tanween {damm, kasr}
   .r(/\u064f\u06e2$/,        '')    // iqlab tanween damm
   .r(/\u0650\u06ed$/,        '')    // iqlab tanween kasr
+  .r(/\u06e2$/,              '')    // iqlab on final noon
+  .r(/(ا)\u06df$/,           '$1')  // remove rounded zero from final alef
+  .r(/(ى)\u0670$/,           '$1')  // remove dagger alef from final alef maqsura
+      // (its existence depends on the first letter of the next word)
   .r(/\u064b([اى]?)$/,       '$1')  // tanween fath
   .r(/\u08f0([اى]?)$/,       '$1')  // open tanween fath
   .r(/\u064e\u06e2([اى]?)$/, '$1')  // iqlab tanween fath
   .r(/\u064e([اى]?)$/,       '$1')  // just fath, before final alef (either kind), because of tanween (eg, إذا)
-  .r(/(ى)\u0670$/,           '$1')  // dagger alef from final alef maqsura (its existence depends on the first letter of the next word)
+  .r(/\u06e4(ا)$/,           '$1')  // madd before the final silent alef after waw
 
 function phrasify ([ title, aayaat ]) {
   // equiv. to: return ayat.flatMap(a => a.split(/(?<=[\u06D6-\u06DC] |\n)/))