patch 8.2.3913: help for expressions does not mention Vim9 syntax
Problem: Help for expressions does not mention Vim9 syntax.
Solution: Add the rules for Vim9 to the expression help. Rename functions
to match the help.
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt
index 47b6e03..1dde731 100644
--- a/runtime/doc/vim9.txt
+++ b/runtime/doc/vim9.txt
@@ -1,4 +1,4 @@
-*vim9.txt* For Vim version 8.2. Last change: 2021 Dec 26
+*vim9.txt* For Vim version 8.2. Last change: 2021 Dec 27
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -81,7 +81,7 @@
echo "hello "
.. yourName
.. ", how are you?"
-- White space is required in many places.
+- White space is required in many places to improve readability.
- Assign values without `:let`, declare variables with `:var`: >
var count = 0
count += 3
@@ -94,8 +94,8 @@
def CallMe(count: number, message: string): bool
- Call functions without `:call`: >
writefile(['done'], 'file.txt')
-- You cannot use `:xit`, `:t`, `:k`, `:append`, `:change`, `:insert`, `:open`,
- and `:s` or `:d` with only flags.
+- You cannot use old Ex commands `:xit`, `:t`, `:k`, `:append`, `:change`,
+ `:insert`, `:open`, and `:s` or `:d` with only flags.
- You cannot use curly-braces names.
- A range before a command must be prefixed with a colon: >
:%s/this/that
@@ -353,7 +353,7 @@
In Vim9 script `:let` cannot be used. An existing variable is assigned to
without any command. The same for global, window, tab, buffer and Vim
-variables, because they are not really declared. They can also be deleted
+variables, because they are not really declared. Those can also be deleted
with `:unlet`.
`:lockvar` does not work on local variables. Use `:const` and `:final`
@@ -597,7 +597,7 @@
Automatic line continuation ~
-
+ *vim9-line-continuation*
In many cases it is obvious that an expression continues on the next line. In
those cases there is no need to prefix the line with a backslash (see
|line-continuation|). For example, when a list spans multiple lines: >
@@ -775,7 +775,7 @@
Dictionary literals ~
-
+ *vim9-literal-dict*
Traditionally Vim has supported dictionary literals with a {} syntax: >
let dict = {'key': value}
@@ -865,7 +865,7 @@
Conditions and expressions ~
-
+ *vim9-boolean*
Conditions and expressions are mostly working like they do in other languages.
Some values are different from legacy Vim script:
value legacy Vim script Vim9 script ~
@@ -917,8 +917,8 @@
'hello ' .. 123 == 'hello 123'
'hello ' .. v:true == 'hello true'
-Simple types are string, float, special and bool. For other types |string()|
-can be used.
+Simple types are Number, Float, Special and Bool. For other types |string()|
+should be used.
*false* *true* *null*
In Vim9 script one can use "true" for v:true, "false" for v:false and "null"
for v:null. When converting a boolean to a string "false" and "true" are