Commits by Year: start yrange from 0.

Gives better proportions on amount of commits during each year.

gitstats

@@ -812,6 +812,7 @@ set output 'commits_by_year.png'
 unset key
 set xtics 1
 set ylabel "Commits"
+set yrange [0:]
 plot 'commits_by_year.dat' using 1:2:(0.5) w boxes fs solid
 """)
 		f.close()