Image locate in left not center

[shuzang]

Two questions

1. All Image locate in left not center if picture syntax as follows

   ![](example.jpg)

   And if add a title, it will be fine.

   ![](example.jpg "title")

   This problem display in commit 296424c first in Mar 8, 2020.

2. Mathematical Formula did not display in the post if I do not set 'math: true' in the post. I remember all I needed to do was set up params.math in config.toml in the past.

[dillonzq]

@shuzang This is designed to be compatible with in-line pictures. If you want to keep images center, you should add a title.