Update code block in readme for rbenv-doctor script (#1353)
Update code block in readme for rbenv-doctor script (#1353)

Co-authored-by: Mislav Marohnić <46f1a0bd5592a2f9244ca321b129902a06b53e03@mislav.net>
sstephenson/rbenv,rbenv/rbenv,sstephenson/rbenv,rbenv/rbenv,sstephenson/rbenv