I often see new users that are unaware of the formatting capabilities of the WMD editor, prominently the "format as code" function.
Some of them don't format their code at all (especially XML and HTML will not show up in the question, and other code gets line-wrapped), or they shoot themselves in the foot trying to make the editor do something that could be easy (replacing
< to make HTML tags appear, sprinkling
<br> tags to force line breaks).
As a user who edits many questions, it results in a lot of work to correct these misunderstandings. I know there are editor buttons and a help section on the right, but in general - people don't read anything.
I propose that new users (less than 100 rep or so) get their WMD editor pre-filled with some advice like this:
Welcome to StackOverflow. Here is a quick overview of what you can do in this editor: Indent blocks of code by four spaces (you will even get automatic syntax highlighting!): <xml code="sample"> <!-- use the "0101" button above, or the CTRL-K keyboard shortcut --> </xml> Use backticks to format inline bits of code: `var hint = "The button or shortcut work here as well!"` You can also write **bold** or *italics*, use lists - like - this or headlines ##Like This## The editor can do even more, take some time to explore its capabilities.