Captions are not aligned with images

[benpackard]

Based on https://github.com/wordpress-mobile/AztecEditor-iOS/pull/860, I would expect that captions are aligned with their attachment.

Specifically:

However, captions are always left-aligned.

To Reproduce

1. Open the Aztec Editor demo app
2. Add an image attachment
3. Make the image thumbnail size and center aligned. Add a caption.

Expected behavior The caption is center-aligned along with the image.

Actual behavior The caption is left-aligned.

Screenshots

[chunxige]

i meet the same question