message: Fix doc explorer description
diff: @@ -93,7 +93,7 @@ export default class FieldDoc extends React.Component<Props, State> {
  </div>
  <MarkdownContent
  className="doc-type-description"
  - markdown={field.description || 'No Description'}
  + markdown={field.description || ''}
  />
  <div className="doc-category-title">
  @@ -101,7 +101,7 @@ export default class FieldDoc extends React.Component<Props, State> {
  </div>
  <MarkdownContent
  className="doc-description"
  - markdown={type.description || 'No Description'}
  + markdown={type.description || ''}
  />
  {type instanceof GraphQLScalarType && <ScalarTypeSchema type={type} />}
  