Remove the invisible format marks from the text chunks

- it aims to fix issue #9186.

src/core/evaluator.js

@@ -2561,6 +2561,9 @@ class PartialEvaluator {
 
       for (let i = 0, ii = glyphs.length; i < ii; i++) {
         const glyph = glyphs[i];
+        if (glyph.isInvisibleFormatMark) {
+          continue;
+        }
         let charSpacing =
           textState.charSpacing + (i + 1 === ii ? extraSpacing : 0);
 
@@ -2601,7 +2604,7 @@ class PartialEvaluator {
         // Must be called after compareWithLastPosition because
         // the textContentItem could have been flushed.
         const textChunk = ensureTextContentItem();
-        if (glyph.isDiacritic) {
+        if (glyph.isZeroWidthDiacritic) {
           scaledDim = 0;
         }
 

src/core/fonts.js

@@ -216,7 +216,8 @@ class Glyph {
 
     const category = getCharUnicodeCategory(unicode);
     this.isWhitespace = category.isWhitespace;
-    this.isDiacritic = category.isDiacritic;
+    this.isZeroWidthDiacritic = category.isZeroWidthDiacritic;
+    this.isInvisibleFormatMark = category.isInvisibleFormatMark;
   }
 
   matchesForCache(

src/core/unicode.js

@@ -1640,12 +1640,13 @@ function reverseIfRtl(chars) {
   return buf.join("");
 }
 
-const SpecialCharRegExp = new RegExp("^(\\s)|(\\p{Mn})$", "u");
+const SpecialCharRegExp = new RegExp("^(\\s)|(\\p{Mn})|(\\p{Cf})$", "u");
 function getCharUnicodeCategory(char) {
   const groups = char.match(SpecialCharRegExp);
   return {
     isWhitespace: !!(groups && groups[1]),
-    isDiacritic: !!(groups && groups[2]),
+    isZeroWidthDiacritic: !!(groups && groups[2]),
+    isInvisibleFormatMark: !!(groups && groups[3]),
   };
 }