The pipe character is being phased in as being the ANSI color code symbol, replacing {c -style markup. This is due to how {} is used as formatting symbols in Python. Currently both |r and {r works for making text red though. See more info in the deprecation warning
here.
To use the pipe in a table, either put it alone with at least one space to the right of it (this is the common way to make table edges) or escape it as two | after one another (||). If you are not interested in colors you could also send the map with stripped markers.
.
Griatch