Problem: Tests failing because there is no error for float to string
conversion.
Solution: Change the check for failure to check for correct result. Make
some conversions strict in Vim9 script.
3cfa5b16b0
Co-authored-by: Bram Moolenaar <Bram@vim.org>
Problem: Using null object with execute() has strange effects.
Solution: Give an error message ofr Job and Channel.
e2a8f0773e
Co-authored-by: Bram Moolenaar <Bram@vim.org>