Although documented to be compiled into the shell ([2016-09-14](https://sqlite.org/docsrc/info/bdbea7dc63fcdc21)), it was not actually included until recently ([2020-08-28](https://www.sqlite.org/src/info/fc0856dccfab273d)). I imagine this will just remain a documentation bug until the scheduled 3.34.0 release ([2020-12-01](https://www.sqlite.org/draft/releaselog/3_34_0.html)).