This is a bug fix for 4063. "Notice: Array to string conversion" when downloading CSV or TSV files from Visitor Log in 1.12.
Some custom variables are in the $csv array as arrays themselves. Line 283 was trying to handle this array as a string and was throwing the error. This fix parses the array into a string prior to the string formatting step. The csv will successfully download with this fix. Tested on PHP 5.4.13.
Pull request for master.
The bug is reproducible with a clean install and generated data using the plugin. The route is address to get the bug is:
I can reproduce w/ php 5.4 & php 5.5. Regarding your changes:
Fixed in 1510afcf0467d7736bbbd197a15722c8a7b65b27.