Update runtime files.
diff --git a/runtime/doc/version6.txt b/runtime/doc/version6.txt
index 355cc79..3cd105b 100644
--- a/runtime/doc/version6.txt
+++ b/runtime/doc/version6.txt
@@ -7882,7 +7882,7 @@
Patch 6.1.221
Problem: Changing case may not work properly, depending on the current
locale.
-Solution: Add the 'casemap' option to let the user chose how changing case
+Solution: Add the 'casemap' option to let the user choose how changing case
is to be done.
Also fix lowering case when an UTF-8 character doesn't keep the
same byte length.