/usr/share/doc/gri/html/example1.gri is in gri-html-doc 2.12.23-9build2.
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 | # Example 1 -- Linegraph using data in a separate file
open example1.dat # Open the data file
read columns x y # Read (x,y)
draw curve # Draw data curve
draw title "Example 1" # A title for plot
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