try without catch should be banned

[SonOfLilit]

This is a serious gotcha that a style guide would do well to document (and forbid):

jashkenas/coffeescript#3958 (comment)

try 1/0

suppresses the exception.

I propose amending Exceptions to say "Do not suppress exceptions. Do not use try without catch nor finally, which is an undocumented and surprising way to suppress exceptions."