/**
* INSERT SELECT wrapper
- * $varMap must be an associative array of the form array( 'dest1' => 'source1', ...)
+ * $varMap must be an associative array of the form [ 'dest1' => 'source1', ... ]
* Source items may be literals rather then field names, but strings should
* be quoted with Database::addQuotes()
* $conds may be "*" to copy the whole table