plotter: embed XY interface in XYZ, fix doc comment (!435) · Merge requests · gonum / plot · GitLab

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Sebastien Binet requested to merge anonymouse64:bugfix/xy_doc_comment_fix into master Apr 04, 2018

Created by: anonymouse64

Better to embed the interface so changes to XYer automatically get moved to XYZer
Fix doc comment to reflect that the XY method (for a XYZs) is for XYZer interface, not XYer interface (though it is technically correct as XY is embedded from the XYer, it's simpler to read this way)