patch 8.2.0459: cannot check if a function name is correct

Problem: Cannot check if a function name is correct. Solution: Add "?funcname" to exists().
vim · Mar 26, 2020 · 15c4760 · 15c4760
1 parent bea9023
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diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
@@ -4102,8 +4102,12 @@ exists({expr})	The result is a Number, which is |TRUE| if {expr} is defined,
 					string)
 			*funcname	built-in function (see |functions|)
 					or user defined function (see
-					|user-functions|). Also works for a
-					variable that is a Funcref.
+					|user-functions|) that is implemented.
+					Also works for a variable that is a
+					Funcref.
+			?funcname	built-in function that could be
+					implemented; to be used to check if
+					"funcname" is valid
 			varname		internal variable (see
 					|internal-variables|).  Also works
 					for |curly-braces-names|, |Dictionary|