patch 8.2.2694: when 'matchpairs' is empty every character beeps
Problem: When 'matchpairs' is empty every character beeps. (Marco Hinz)
Solution: Bail out when no character in 'matchpairs' was found.
(closes #8053) Add assert_nobeep().
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 57ab47e..97c968c 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -2440,6 +2440,7 @@
Number assert {actual} is inside the range
assert_match({pat}, {text} [, {msg}])
Number assert {pat} matches {text}
+assert_nobeep({cmd}) Number assert {cmd} does not cause a beep
assert_notequal({exp}, {act} [, {msg}])
Number assert {exp} is not equal {act}
assert_notmatch({pat}, {text} [, {msg}])