The PDF Toolbar that comes up in Google Chrome when displaying a PDF can be suppressed by modifying the URL.
Both HEAD^ and HEAD~ can be used in Git to refer to previous commits but in different ways.
By default Vim is the editor used when writing a Git commit message. While I love Vim, it does work very differently than most other editors. A good option for those who are not comfortable with Vim, is to use a different editor. This is how to setup Git to use a different editor.
I do most of my work in Vim (or Neovim) in tmux inside of iTerm on my Mac. I found my color schemes were being properly applied in Neovim but not in Vim (version 8). Adding two lines to my .vimrc corrected the problem for me.
The interactive rebase feature of Git is one of my favorites. I love being able to squash multiple commits into one commit or re-order my commits for clarity. My one complaint is the Git interactive rebase commit order is wrong (at least for the way my brain works).
The WordPress plugin repository at wordpress.org/plugins is a great resource. I often use WP CLI to install plugins on my WordPress site from there, however, sometimes I want to install other plugins with WP CLI.
When creating new posts for a video demonstration, I wanted to display a consistent date. While my first thought was to reset my system clock, this snippet overrides the date when the post is first created, which worked for me.
I spend a lot of time working in issue trackers (e.g. GitHub), which involves writing a lot of markdown. Sometimes, perhaps I write too much information and it would be nice to allow the person reading to optionally skip some details. Traditionally, I accomplish this with a “Summary” section but now with collapsible sections in GitHub Issues, I can write even tidier comments.