fix subplot docs

[sglyon]

No description provided.

[codecov-commenter]

Codecov Report

Merging #404 (604b37b) into master (67fc479) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #404   +/-   ##
=======================================
  Coverage   39.01%   39.01%           
=======================================
  Files           4        4           
  Lines         264      264           
=======================================
  Hits          103      103           
  Misses        161      161           

Flag	Coverage Δ
unittests	39.01% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/display.jl	20.00% <0.00%> (ø)

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