Exporting contacts - extra spaces in header row

There is a small problem with the standard Contacts Export function: in the header row of the csv file that is generated, there is an extra space between the columns , which causes problems when later importing those csv files into Excel or Number Mac, or other software

For example, if the columns were First Name, Last Name, email, the first row of the exported csv would look like this:
"First Name", "Last Name", "email"
When it should be:
"First Name","Last Name","email"

the data rows are fine..

Here is the fix i suggest:
in the file:
/modules/Vtiger/actions/ExportData.php
on line 254, took out the space from:
$header = implode("\", \"", $headers);
to:
$header = implode("\",\"", $headers);

Thank you