Compute the transitive reduction of directed graphs. Graphviz filters:
acyclic,bcomps,comps,edgepaint,gvcolor,gvpack,mingle,nop,sccmap,tred, &unflatten. More information: https://www.graphviz.org/pdf/tred.1.pdf.
tred {{path/to/input1.gv path/to/input2.gv ...}} > {{path/to/output.gv}}
tred -?