I am building a blog site using Github pages + Jekyll, everything seems correct except that the head command #, you can find the display in hello webpage, I am sorry that the content is in Chinese, it seems that the head command is not properly parsed. The github repository is github, I tried to fix it but failed. Thanks a lot.
In markdown, we use
# Header 1
## Header 2
### Header 3
which will be parsed as
to represent different layers of bold fonts, used for section name. in my blog you can see though the header has been bold, symbol # is still there.
It's not from Jekyll, it's from anchor-js, a script that was configured by your theme. I see you can disable it by setting this line to false.