patch 8.2.2547: "%" command not accurate for big files

Problem:    "%" command not accurate for big files.
Solution:   Make it more accurate for files up to 21M lines. (Dominique Pellé,
            closes #7889)
diff --git a/src/version.c b/src/version.c
index c63e60c..7eb0d05 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2547,
+/**/
     2546,
 /**/
     2545,