--- a/langtools/test/jdk/jshell/UITesting.java	Mon Aug 21 16:37:17 2017 -0400
+++ b/langtools/test/jdk/jshell/UITesting.java	Tue Aug 22 13:10:46 2017 +0200
@@ -138,7 +138,7 @@
             while (true) {
                 Matcher m = expectedPattern.matcher(out);
                 if (m.find()) {
-                    out.delete(0, m.end() + 1);
+                    out.delete(0, m.end());
                     return ;
                 }
                 long e =  System.currentTimeMillis();