[devdocsgjs/main: 1021/1867] Update gnuplot to 5.2.8

[Andy Holmes <andyholmes src gnome org>]

commit d6c9d2b41fad2b7f31182b47bac4698f32df2243
Author: Jed Fox <git twopointzero us>
Date:   Tue Jan 14 12:22:55 2020 -0500

    Update gnuplot to 5.2.8

 lib/docs/scrapers/gnuplot.rb | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/lib/docs/scrapers/gnuplot.rb b/lib/docs/scrapers/gnuplot.rb
index dc55edb7..0682ade4 100644
--- a/lib/docs/scrapers/gnuplot.rb
+++ b/lib/docs/scrapers/gnuplot.rb
@@ -1,13 +1,12 @@
 module Docs
   class Gnuplot < FileScraper
-    self.name = 'Gnuplot'
-    self.slug = 'gnuplot'
     self.type = 'gnuplot'
+    self.release = '5.2.8'
     self.links = {
       home: 'http://gnuplot.sourceforge.net/'
     }
 
-    self.root_path = 'index.html'
+    self.root_path = 'nofigures.html'
 
     html_filters.push 'gnuplot/entries', 'gnuplot/clean_html'
 
@@ -30,6 +29,7 @@ module Docs
       Commands.html
       Contents.html
       Bugs.html
+      Index.html
     )
 
     options[:attribution] = <<-HTML