/usr/share/frei0r/html/frei0r_8h__incl.dot is in frei0r-plugins-doc 1.4-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | digraph "frei0r.h"
{
edge [fontname="FreeSans",fontsize="10",labelfontname="FreeSans",labelfontsize="10"];
node [fontname="FreeSans",fontsize="10",shape=record];
Node1 [label="frei0r.h",height=0.2,width=0.4,color="black", fillcolor="grey75", style="filled" fontcolor="black"];
Node1 -> Node2 [color="midnightblue",fontsize="10",style="solid",fontname="FreeSans"];
Node2 [label="inttypes.h",height=0.2,width=0.4,color="grey75", fillcolor="white", style="filled"];
}
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