Update runtime files.
diff --git a/runtime/doc/testing.txt b/runtime/doc/testing.txt
index 9644685..5be1890 100644
--- a/runtime/doc/testing.txt
+++ b/runtime/doc/testing.txt
@@ -1,4 +1,4 @@
-*testing.txt* For Vim version 8.2. Last change: 2020 Sep 06
+*testing.txt* For Vim version 8.2. Last change: 2020 Dec 12
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -308,8 +308,11 @@
first reported error: >
assert_fails('cmd', ['E987:.*expected bool'])
< The second pattern, if present, is matched against the last
- reported error. To only match the last error use an empty
- string for the first error: >
+ reported error.
+ If there is only one error then both patterns must match. This
+ can be used to check that there is only one error.
+ To only match the last error use an empty string for the first
+ error: >
assert_fails('cmd', ['', 'E987:'])
<
If {msg} is empty then it is not used. Do this to get the