Negative background positioning
To set a background image just a little bit off the bottom right, use
background-position: bottom right is synonymous to
background-position: 100% 100% which would put the image at the
bottom right of its container.
calc does is move the image 5px to the left and 40px up.
Delete a problematic character
I was trying to parse some XML but it kept failing. Eventually tracked it down to a “substitute character” in the file that was messing everything up.
Because the file was over 140,000 lines, editing it with text editor was not something I wanted to mess with.
Eventually remembered the
tr command-line tool that normally
translates character sets but can also delete them:
032 is the octal character codepoint of the “substitute character.”