Don't recommend if let if let else works

compiler/rustc_error_messages/locales/en-US/mir_build.ftl

@@ -358,7 +358,7 @@ mir_build_suggest_if_let = you might want to use `if let` to ignore the {$count
         *[other] variants that aren't
     } matched
 
-mir_build_suggest_let_else = alternatively, you might want to use `let else` to handle the {$count ->
+mir_build_suggest_let_else = you might want to use `let else` to handle the {$count ->
         [one] variant that isn't
         *[other] variants that aren't
     } matched