--- bc-java-r1v81/pg/src/main/java/org/bouncycastle/bcpg/ArmoredOutputStream.java	2025-06-18 16:53:17.839002101 +0200
+++ bc-java-r1v81/pg/src/main/java/org/bouncycastle/bcpg/ArmoredOutputStream.java	2025-06-18 16:53:25.752560133 +0200
@@ -619,7 +619,7 @@
 
             if (comment.length() > availableCommentCharsPerLine)
             {
-                comment = comment.substring(0, availableCommentCharsPerLine - 1) + '…';
+                comment = comment.substring(0, availableCommentCharsPerLine - "…".length()) + "…";
             }
             addComment(comment);
             return this;