rename sent_ESC_br_n6 variable to sent_ESC_br6n

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/Config.in b/libbb/Config.in
index 60ae0ff..55367b2 100644
--- a/libbb/Config.in
+++ b/libbb/Config.in
@@ -111,7 +111,7 @@
 	  current cursor position. This information is used to make line
 	  editing more robust in some cases.
 	  If you are not sure whether your terminals respond to this code
-	  correctly, or want to save on code size (about 300 bytes),
+	  correctly, or want to save on code size (about 400 bytes),
 	  then do not turn this option on.
 
 config FEATURE_NON_POSIX_CP