Update readme

docs/rules/jsx-props-no-spreading.md

@@ -27,9 +27,9 @@ const {one_prop, two_prop} = otherProps;
 ```js
 ...
 "react/jsx-props-no-spreading": [{
-    "html": "ignore"|"enforce",
-    "custom": "ignore"|"enforce",
-    "explicitSpread": "ignore"|"enforce",
+    "html": "ignore" | "enforce",
+    "custom": "ignore" | "enforce",
+    "explicitSpread": "ignore" | "enforce",
     "exceptions": [<string>]
 }]
 ...
@@ -66,6 +66,16 @@ The following patterns are still considered warnings:
 <img {...props} />
 ```
 
+### explicitSpread
+
+`explicitSpread` set to `ignore` will ignore spread operators that are explicilty listing all object properties within that spread. Default is set to `enforce`.
+
+The following pattern is **not** considered warning when `explicitSpread` is set to `ignore`:
+
+```jsx
+<img {...{ prop1, prop2, prop3 }} />
+```
+
 ### exceptions
 
 An "exception" will always flip the resulting html or custom setting for that component - ie, html set to `ignore`, with an exception of `div` will enforce on an `div`; custom set to `enforce` with an exception of `Foo` will ignore `Foo`.