[Groff] eqn matrix?

[andlabs]

Hello. Given

.EQ
matrix {
        ccol {
                { { roman cot ^ x } = { cos x } over { sin x } }
        above { { arc roman cot ^ x } = { pi over 2 } - { arc tan x } }
        above { { roman coth ^ x } = { cosh x } over { sinh x } }
        }
        ccol {
                { { roman sec ^ x } = 1 over { cos x } }
        above { { arc roman sec ^ x } = arc cos x sup -1 }
        above { { roman sech ^ x } = 1 over { cosh x } }
        }
        ccol {
                { { roman csc ^ x } = 1 over { sin x } }
        above { { arc roman csc ^ x } = arc sin x sup -1 }
        above { { roman csch ^ x } = 1 over { sinh x } }
        }
}
.EN

I get:

eqn:pghoc:365: syntax error
 context is
        matrix { >>>     <<<

What does this mean? I thought eqn ignored whitespace.
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