IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Keyword
    clojure.lang.RT.seqFrom (RT.java:505)
    clojure.lang.RT.seq (RT.java:486)
    clojure.lang.RT.first (RT.java:578)
    clojure.core/first (core.clj:55)
    clj-pdf.core/cell (core.clj:241)
    clj-pdf.core/table (core.clj:376)
    clojure.core/apply (core.clj:617)
    clj-pdf.core/make-section (core.clj:576)
    clj-pdf.core/paragraph (core.clj:163)
    clojure.core/apply (core.clj:617)
    clj-pdf.core/make-section (core.clj:576)
    clj-pdf.core/append-to-doc (core.clj:589)