为什么graphviz从uncap_spike绘制两个箭头到peel，为什么它在hang的右侧绘制peel？
我想要 uncap_spike -> 剥离 -> 挂起 -> 穗，按此顺序，每个之间有一个边缘。
digraph hangers {
compound=true
fontname="Gill Sans"
node [fontname="Gill Sans" shape=box fillcolor=white style="rounded, filled"]
edge [fontname="Gill Sans"]
subgraph cluster_prep {
style="filled"
label=Prep
gather [shape=Mrecord label="{gather | EtOH swab\nvented tubing}"]
uncap_bottle [label="uncap bottle"]
uncap_spike [label="uncap spike"]
swab [shape=Mrecord label="{swab EtOH | wait 30 seconds for sterility}"]
gather -> uncap_bottle -> swab -> uncap_spike
{rank=same gather uncap_bottle swab uncap_spike}
}
subgraph cluster_hang {
style=filled
label=Hang
{rank=same peel hang}
}
{rank=same uncap_spike -> peel -> hang -> spike -> prime}
hang -> rip [color=firebrick]
rip [label="eyelet\nripped" style="filled" shape=octagon regular fontcolor=white
fontsize=10 width=.5 fixedsize color=firebrick fillcolor=firebrick ]
swab -> not_sterile [color=firebrick]
not_sterile [label="not\nsterile" style="filled" shape=octagon regular fontcolor=white
fontsize=10 width=.5 fixedsize color=firebrick fillcolor=firebrick ]
}