readline: update _ttyWrite to use instance line ending pattern

Signed-off-by: Francesco Castaldi <info@francescocastaldi.it>
FrancescoCastaldi · Oct 3, 2026 · Oct 3, 2026 · Oct 3, 2026 · Oct 3, 2026 · Oct 3, 2026
commit 0d756c77f5c461000ab1426d7df8885946bd617a
diff --git a/lib/internal/readline/interface.js b/lib/internal/readline/interface.js
@@ -89,7 +89,6 @@ const kMincrlfDelay = 100;
  */
 const lineEndingWithUnicode = /\r?\n|\r(?!\n)|\u2028|\u2029/g;
 const lineEndingWithoutUnicode = /\r?\n|\r(?!\n)/g;
-const lineEnding = lineEndingWithUnicode;
 
 const kLineObjectStream = Symbol('line object stream');
 const kQuestionCancel = Symbol('kQuestionCancel');
@@ -1572,16 +1571,16 @@ class Interface extends InterfaceConstructor {
         default:
           if (typeof s === 'string' && s) {
             // Erase state of previous searches.
-            lineEnding.lastIndex = 0;
+            this[kLineEnding].lastIndex = 0;
             let nextMatch;
             // Keep track of the end of the last match.
             let lastIndex = 0;
-            while ((nextMatch = RegExpPrototypeExec(lineEnding, s)) !== null) {
+            while ((nextMatch = RegExpPrototypeExec(this[kLineEnding], s)) !== null) {
               this[kInsertString](StringPrototypeSlice(s, lastIndex, nextMatch.index));
-              ({ lastIndex } = lineEnding);
+              ({ lastIndex } = this[kLineEnding]);
               this[kLine]();
               // Restore lastIndex as the call to kLine could have mutated it.
-              lineEnding.lastIndex = lastIndex;
+              this[kLineEnding].lastIndex = lastIndex;
             }
             // This ensures that the last line is written if it doesn't end in a newline.
             // Note that the last line may be the first line, in which case this still works.