even first example of Usage/canvas fails

[jidanni]

Even the very first example of http://www.imagemagick.org/Usage/canvas/ fails:
$ convert -size 100x100 canvas:khaki canvas_khaki.gif
convert: unable to open image `canvas:khaki': @ error/blob.c/OpenBlob/2489.
convert: missing an image filename `canvas_khaki.gif' @ error/convert.c/ConvertImageCommand/2940.
The second one works though.

[magick]

Use xc: instead. The canvas: image format was recently added.

[anthony]

You wouldn't happen to remember the version number of that addition?
I can then add a version warning in that example.

I could not see it in the ChangeLog