fix and improve description

src/scriptlets/trusted-set-constant.js

@@ -33,15 +33,16 @@ import {
  *
  * > If empty object is present in chain it will be trapped until chain leftovers appear.
  *
- * > Use [set-constant](./about-scriptlets.md#set-constant) to set predefined values and functions
+ * > Use [set-constant](./about-scriptlets.md#set-constant) to set predefined values and functions.
  *
  * **Syntax**
  * ```
- * example.org#%#//scriptlet('trusted-set-constant', property, value[, inferType[, stack]])
+ * example.org#%#//scriptlet('trusted-set-constant', property, value[, stack])
  * ```
  *
  * - `property` - required, path to a property (joined with `.` if needed). The property must be attached to `window`.
- * - `value` - required, an arbitrary value to be set. Value type is being inferred from the argument.
+ * - `value` - required, an arbitrary value to be set; value type is being inferred from the argument, e.g '500' will be set as number;
+ * to set string type value wrap argument into another pair of quotes: `'"500"'`;
  * - `stack` - optional, string or regular expression that must match the current function call stack trace;
  * if regular expression is invalid it will be skipped
  *