Fix spelling mistake

Author: traviswindsormoodle

general/development/policies/codingstyle/index.md

@@ -1196,7 +1196,7 @@ function goodfunction(
 
 </ValidExample>
 
-If there was a very good reason, then the use of an array could be considered. But it is strongly encouraged that all parameters be explict and typed.
+If there was a very good reason, then the use of an array could be considered. But it is strongly encouraged that all parameters be explicit and typed.
 
 ## Control statements