String Substitution

suggest change

p "This is %s" % "foo"
# => "This is foo"

p "%s %s %s" % ["foo", "bar", "baz"]
# => "foo bar baz"

p "%{foo} == %{foo}" % {:foo => "foo" }
# => "foo == foo"

See String % docs and Kernel::sprintf for more details.

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