Problem:    Confusing error when expression is followed by comma.
Solution:   Give a different error for trailing text. (closes #8395)

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.

Problem:    Eval test fails because for loop on string works.
Solution:   Check looping over function reference fails.

Problem:    Cursor on invalid line with range and :substitute.
Solution:   Do not move the cursor when skipping commands. (closes #3434)

Problem:    No easy way to get the maximum or mininum number value.
Solution:   Add v:numbermax and v:numbermin.

Problem:    0o777 not recognized as octal.
Solution:   Use vim_isodigit(). (Ken Takata, closes #7633, closes #7631)

Problem:    Tests do not check the error number properly.0
Solution:   Add a colon after the error number. (closes #6869)

Problem:    No longer get an error for string concatenation with float.
            (Tsuyoshi Cho)
Solution:   Only convert float for Vim9 script. (closes #6787)

Problem:    Not all file read and writecode is tested.
Solution:   Add a few tests. (Dominique Pellé, closes #6764)

Problem:    Curly braces expression ending in " }" does not work.
Solution:   Skip over white space when checking for "}". (closes #6634)