change docs

docs/src/rules/no-implicit-coercion.md

@@ -46,7 +46,7 @@ This rule has three main options and one override option to allow some coercions
 * `"number"` (`true` by default) - When this is `true`, this rule warns shorter type conversions for `number` type.
 * `"string"` (`true` by default) - When this is `true`, this rule warns shorter type conversions for `string` type.
 * `"disallowTemplateShorthand"` (`false` by default) - When this is `true`, this rule warns `string` type conversions using `${expression}` form.
-* `"allow"` (`empty` by default) - Each entry in this array can be one of `~`, `!!`, `+`, `--`, `-`, or `*` that are to be allowed.
+* `"allow"` (`empty` by default) - Each entry in this array can be one of `~`, `!!`, `+`, `-(-)`, `-`, or `*` that are to be allowed.
 
 Note that operator `+` in `allow` list would allow `+foo` (number coercion) as well as `"" + foo` (string coercion).