Markdown Preview in application differs from the actual Markdown in GitHub

From the current PE runs being conducted in CS2103. After submitting a developer response to a bug in Catcher, the preview of the typed markdown shows up fine in the app itself, like so:

However, when I went back to the actual GitHub page just to check on the issue, I discovered that some of the images aren't displaying, like so:

Which is probably due to a slight difference in the way Github and Catcher processes leading whitespaces.

Not sure whether this affects the other student receiving the reply in their Catcher app. The relevant issue page in the screenshot above is [here](https://github.com/nus-cs2103-AY1920S1/pe-dev-response/issues/153)

Start by reproducing the discrepancy using the linked GitHub issue and the Markdown shown in the screenshots, then compare the application's preview with GitHub's rendering. Done means the same image content displays correctly in both places, including the affected leading-whitespace case.

Written by the indexing model from the issue text.