Bug: tfoot_open / tfoot_close have no default when using custom table template

[richard-keasley]

description
ErrorException "Undefined index: tfoot_open" is thrown when rendering a table with a footer.

CodeIgniter 4 version
4.1.0

Affected module(s)
File: System/View/Table.php
Function: _compileTemplate()
Line: 500

Expected behavior, and steps to reproduce if appropriate
Use \CodeIgniter\View\Table()
Set a custom template, but omit tfoot_open or tfoot_close
Add something to the table using setFooting()
call generate()

suggested solution

the keys tfoot_open and tfoot_close have been missed from the array on line 501.

Replace

foreach (['table_open', 'thead_open', 'thead_close', 'heading_row_start', 'heading_row_end', 'heading_cell_start', 'heading_cell_end', 'tbody_open', 'tbody_close', 'row_start', 'row_end', 'cell_start', 'cell_end', 'row_alt_start', 'row_alt_end', 'cell_alt_start', 'cell_alt_end', 'table_close'] as $val)
{  
    if (! isset($this->template[$val]))  
    {    
        $this->template[$val] = $temp[$val];  
    }  
}

with

foreach($temp as $key=>$val)  
{  
    if (! isset($this->template[$key]))  
    {  
        $this->template[$key] = $val;  
    }  
}