In fact, the next person who uses that phrase will get a smack up the side of the head.
The correct phrase doesn't need perfect English punctuation, as its a slang comment. It's not quite as "hip" if you throw in a "the" and a "of".
(May as well throw in some incorrect spelling too because it is "wicked, bra!"
"Da next person who uses dat phrase will a smack upside da head!"
Cool Person's Speech, - 101.
Muskets will still slaughter Longswords simply because they are ranged; first attack lands before the knife wielders are even in range .. that and the resource requirement is more than enough to justify the strength.
You are obviously speaking ingame wise, but unfortunately no, muskets and all the kin to follow (infantry/paratroopers/riflemen) are not ranged units. They are melee units. The reason for this has been explained but I can't be bothered to bring it up in this thread.
In-real life, they may well shoot first, but some will miss, others will hit and not penetrate, some longswords might fall, but the majoirty will close in on the muskets, muskets take a long time to reload, the longswords probably won't take more than two hits. With armour resistant to mere musket bullets, you will get into melee combat, and there the heavily armoured longswords have a distinct advantage.