Mention GraphViz Dot in dijkstra man page & help
dijkstra has no mention of origin or author, nor most importantly of input format.
refereed to as simply 'streamed graphs'
It is of course near useless to do a meaningful web search on the term 'dijkstra' so on a systen where one did not recently personally install GraphVis there is no clue as to what format the input should take.
suggest adding the words
Graphviz dot and perhaps an example sporting a
NAME dijkstra - single-source distance filter SYNOPSIS dijkstra [ -adp? ] [ sourcenode dotfile ] DESCRIPTION dijkstra reads a stream of GraphViz Dot formatted graphs and for each computes the distance of every node from sourcenode. ...