Spelling Fixes (#86056)

## About The Pull Request
Fixes several errors to spelling, grammar, and punctuation.
## Why It's Good For The Game
Improves readability and user experience.
## Changelog
🆑
spellcheck: fixed a few typos
/🆑

code/modules/assembly/flash.dm

@@ -128,7 +128,7 @@
 /**
  * Handles actual flashing part of the attack
  *
- * This proc is awful in every sense of the way, someone should definately refactor this whole code.
+ * This proc is awful in every sense of the way, someone should definitely refactor this whole code.
  * Arguments:
  * * M - Victim
  * * user - Attacker
@@ -161,7 +161,7 @@
 		else if(sigreturn & DEVIATION_OVERRIDE_NONE)
 			deviation = DEVIATION_NONE
 
-	//If you face away from someone they shouldnt notice any effects.
+	//If you face away from someone they shouldn't notice any effects.
 	if(deviation == DEVIATION_FULL)
 		return
 
@@ -185,7 +185,7 @@
 /**
  * Handles the directionality of the attack
  *
- * Returns the amount of 'deviation', 0 being facing eachother, 1 being sideways, 2 being facing away from eachother.
+ * Returns the amount of 'deviation', 0 being facing each other, 1 being sideways, 2 being facing away from each other.
  * Arguments:
  * * victim - Victim
  * * attacker - Attacker