message: Minor grammar tweak to `codeMirrorTheme` docs
diff: @@ -96,7 +96,7 @@ GraphiQL supports customization in UI and behavior by accepting React props and
  - `getDefaultFieldNames`: an optional function used to provide default fields to non-leaf fields which invalidly lack a selection set. Accepts a GraphQLType instance and returns an array of field names. If not provided, a default behavior will be used.
  -- `codeMirrorTheme`: an optional string of a CodeMirror theme that should be applied to the `QueryEditor`, `ResultViewer`, and `Variables` panes. Defaults to the `graphiql` theme. See below for full usage.
  +- `codeMirrorTheme`: an optional string naming a CodeMirror theme to be applied to the `QueryEditor`, `ResultViewer`, and `Variables` panes. Defaults to the `graphiql` theme. See below for full usage.
  **Children:**
  