Bash script formatting, documenting tool?

Back when I was doing a lot of xBase (dBase, Foxbase, FoxPro) programming I had a too called FoxDoc which would format xBase code files and also produce a file with the vertical lines and such showing loops, if and case statements etc. This was very helpful in sorting out a complex program. I am wondering if there is something similar for bash scripts? I have done some searching but the results generally have to with using bash to format documents, not with formatting the bash scripts. I don't get along with search tools sometimes :(

Any suggestions?

TIA,

Ken