Question: When I type any word ending with an 'l' (ell, like "local") and then press the `/` key, the 'l' is replaced with another symbol and the slash, '/', is omitted. How can I deactivate that function?

[![enter image description here](https://i.stack.imgur.com/lBxkj.gif)](https://i.stack.imgur.com/lBxkj.gif)

Answer: 
I had this same problem because I had an old Monaco font in ~/Library/Fonts/. I was able to disable the old font with FontBook, and the issue was resolved.

Note that I had the same issue with a number of leftover old fonts. I was able to clean them all out in FontBook with "Look for enabled duplicates..."
This looks to me like a rendering bug rather than a feature. I would try increasing the font size on your terminal.