Fixes spelling and grammar for some gunmods.
Merge pull request #8101 from Rivet-the-Zombie/gunmodfixez-yeaaaaaahhhhh!

Fixes spelling and grammar for some gunmods.
two fixes:

bug: radio cars can go throught furniture
bug: radio cars with bombs can be detonated by any signal (not RED button only)
Allow worn items without invlet

Assign an invlet to newly worn items if possible, but do not force a invlet.
Changing invlets allows worn items without invlet.
Changing invlets can be use to remove the invlet completely.
astyle game::reassign_item
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA
Merge branch 'radiocars_fix' of https://github.com/HuXTUS/Cataclysm-DDA into merge
Merge branch 'allow-worn-without-invlet' of https://github.com/BevapDin/Cataclysm-DDA into merge
whitespace/tab cleanup

Shortens the collision text as well.