[gentoo-user] What does "#" mean in emerge output?

[Chris Stankevitz]

# emerge --oneshot --ask wxGTK

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   #] x11-libs/wxGTK-2.9.4.1

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Hello,

In the above emerge instance, a "#" symbol appears in the emerge
output.   What does this mean?  "man emerge" seems to skip this when
describing these "OUTPUTS".

Thank you,

Chris