:Trim string char max -- strip white spaces (or other characters) from the beginning and end of a string
::                    -- string [in,out] - string variable to be trimmed
::                    -- char   [in,opt] - character to be trimmed, default is space
::                    -- max    [in,opt] - maximum number of characters to be trimmed from the end, default is 32
call:lTrim "%~1" "%~2"
call:rTrim "%~1" "%~2" "%~3"
EXIT /b