fixup: address comments in util.md

Author: BridgeAR

doc/api/util.md

@@ -362,8 +362,8 @@ added: v0.3.0
 changes:
   - version: REPLACEME
     pr-url: https://github.com/nodejs/node/pull/REPLACEME
-    description: The inspection output is now limited to 128 MB. Data above that
-                 size not be inspected fully anymore.
+    description: The inspection output is now limited to about 128 MB. Data
+                 above that size will not be fully inspected.
   - version: v10.6.0
     pr-url: https://github.com/nodejs/node/pull/20725
     description: Inspecting linked lists and similar objects is now possible
@@ -536,10 +536,10 @@ console.log(inspect(weakSet, { showHidden: true }));
 ```
 
 Please note that `util.inspect()` is a synchronous method that is mainly
-intended as a debugging tool. Its maximum output length is limited to 128 MB and
-input values that result in output bigger than that will not be inspected fully.
-Such values can have a significant performance overhead that can block the event
-loop for a significant amount of time.
+intended as a debugging tool. Its maximum output length is limited to
+approximately 128 MB and input values that result in output bigger than that
+will not be inspected fully. Such values can have a significant performance
+overhead that can block the event loop for a significant amount of time.
 
 ### Customizing `util.inspect` colors