src,doc: fix grammar due to missing 'is'

wjabbour · richardlau · commit bcc1d431f87d · 2020-09-01T11:15:43.000-04:00
PR-URL: #34897 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com> Reviewed-By: David Carlier <devnexen@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
diff --git a/src/README.md b/src/README.md
@@ -402,7 +402,7 @@ that state is through the use of `Environment::AddBindingData`, which gives
 binding functions access to an object for storing such state.
 That object is always a [`BaseObject`][].
 
-Its class needs to have a static `binding_data_name` field that based on a
+Its class needs to have a static `binding_data_name` field based on a
 constant string, in order to disambiguate it from other classes of this type,
 and which could e.g. match the binding&rsquo;s name (in the example above, that would
 be `cares_wrap`).
