patch 9.0.1727: minor problems with the teapot

[Christian Brabandt]

patch 9.0.1727: minor problems with the teapot

Commit: https://github.com/vim/vim/commit/b0efa49ed179d3aa1fa0358d4c3c6d35a0efb291
Author: Sean Dewar <sean...@users.noreply.github.com>
Date: Sat Jul 8 10:35:19 2023 +0100

patch 9.0.1727: minor problems with the teapot

Problem: minor problems with the teapot()
Solution: remove the null check, update documentation

Update the builtin-function-list entry. (It implicitly returns 0, but such
functions usually use "none")

Also, tv_get_string_strict() can not return NULL, so remove that check

closes: #12647

Signed-off-by: Christian Brabandt <c...@256bit.org>
Co-authored-by: Sean Dewar <sean...@users.noreply.github.com>

diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 2f6961d7d..6a5ec1bac 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -156,7 +156,7 @@ digraph_setlist({digraphlist}) Boolean register multiple |digraph|s
echoraw({expr}) none output {expr} as-is
empty({expr}) Number |TRUE| if {expr} is empty
environ() Dict return environment variables
-err_teapot() Number produce error 418
+err_teapot([{expr}]) none give E418, or E503 if {expr} is |TRUE|
escape({string}, {chars}) String escape {chars} in {string} with '\'
eval({string}) any evaluate {string} into its value
eventhandler() Number |TRUE| if inside an event handler
diff --git a/src/evalfunc.c b/src/evalfunc.c
index ab6606f76..ef0414c68 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -3936,7 +3936,7 @@ f_err_teapot(typval_T *argvars, typval_T *rettv UNUSED)
if (argvars[0].v_type == VAR_STRING)
{
char_u *s = tv_get_string_strict(&argvars[0]);
- if (s == NULL || *skipwhite(s) == NUL)
+ if (*skipwhite(s) == NUL)
return;
}

diff --git a/src/version.c b/src/version.c
index 0661b279b..b9e584d20 100644
--- a/src/version.c
+++ b/src/version.c
@@ -695,6 +695,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1727,
/**/
1726,
/**/