patch 8.1.0515: reloading a script gives errors for existing functions
Problem: Reloading a script gives errors for existing functions.
Solution: Allow redefining a function once when reloading a script.
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 2027c2e..b261d58 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -9673,9 +9673,13 @@
deleted if there are no more references to it.
*E127* *E122*
When a function by this name already exists and [!] is
- not used an error message is given. When [!] is used,
- an existing function is silently replaced. Unless it
- is currently being executed, that is an error.
+ not used an error message is given. There is one
+ exception: When sourcing a script again, a function
+ that was previously defined in that script will be
+ silently replaced.
+ When [!] is used, an existing function is silently
+ replaced. Unless it is currently being executed, that
+ is an error.
NOTE: Use ! wisely. If used without care it can cause
an existing function to be replaced unexpectedly,
which is hard to debug.