In-progress browser for a directory of text files

add a new manual test

It used to pass but the previous commit has somehow regressed this.

Created by  Kartik K. Agaram  on October 25, 2023
3KHXY6NWG7UVRPTY4YA64WT76TWNI2OIJJHAZ7BXIJ2YBCPULWLQC
Change contents