Update naming-conventions.md

Author: josevalim

lib/elixir/pages/references/naming-conventions.md

@@ -107,12 +107,10 @@ Type checks and other boolean checks that are allowed in guard clauses are named
 
 Examples: `Integer.is_even/1`, `is_list/1`
 
-These functions and macros follow the Erlang convention of an `is_` prefix, instead of a trailing question mark, precisely to indicate that they are allowed in guard clauses.
+These functions and macros follow the Erlang convention of an `is_` prefix, instead of a trailing question mark, precisely to indicate that they are allowed in guard clauses. Type checks that are not valid in guard clauses do not follow this convention, such as `Keyword.keyword?/1`.
 
 A trailing question mark should not be used in combination with the `is_` prefix.
 
-Note that type checks that are not valid in guard clauses do not follow this convention. For example: `Keyword.keyword?/1`.
-
 ## Special names
 
 Some names have specific meaning in Elixir. We detail those cases below.