depth_first_search: Return visitor by value#307

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rkohrt wants to merge 7 commits intoboostorg:developfrom

rkohrt:rkohrt-patch-1

Commits on Sep 12, 2022

align code to documentation
rkohrt
authored

Commits on Sep 15, 2022

return by value instead
Ralf Kohrt
committed
return the right copy
Ralf Kohrt
committed

Commits on Sep 27, 2022

add test to verify visitor is being copied
Ralf Kohrt
committed
remove includes
Ralf Kohrt
committed
Merge branch 'rkohrt-patch-1' of github.com:rkohrt/graph into rkohrt-patch-1
Ralf Kohrt
committed

Commits on Sep 28, 2022

review comments
Ralf Kohrt
committed