Again, I don't see a code respository to post this stuff, so I'll just paste it here. I saw use for CamelCase and Underscores to spaces in the names of the tabs from the admin.
So on line 174 of multiedit.php:
// CamelCase => Camel Case:
$mclean = preg_replace('/(?<=\\w)(?=[A-Z])/'," $1", $mclean);
// Underscores to Spaces:
$mclean = str_replace("_", " ", $mclean);
(This goes right after $mclean = trim($matches[1]);, in case your current source differs from mine.)