Updated the tests.

test/mu/compare/expected-econ-table-lualatex.pdf

test/mu/compare/expected-econ-table-pdflatex.pdf

...u/compare/expected-fi-bibliography-solicited-lualatex.pdf

...u/compare/expected-fi-bibliography-solicited-pdflatex.pdf

...compare/expected-fi-bibliography-unsolicited-lualatex.pdf

...compare/expected-fi-bibliography-unsolicited-pdflatex.pdf

test/mu/compare/expected-fi-color-lualatex.pdf

test/mu/compare/expected-fi-color-pdflatex.pdf

test/mu/compare/expected-fi-czech-female-lualatex.pdf

test/mu/compare/expected-fi-czech-female-pdflatex.pdf

test/mu/compare/expected-fi-czech-lualatex.pdf

test/mu/compare/expected-fi-czech-male-lualatex.pdf

test/mu/compare/expected-fi-czech-male-pdflatex.pdf

test/mu/compare/expected-fi-czech-pdflatex.pdf

.../compare/expected-fi-digital-emptyassignment-lualatex.pdf

.../compare/expected-fi-digital-emptyassignment-pdflatex.pdf

.../mu/compare/expected-fi-digital-noassignment-lualatex.pdf

.../mu/compare/expected-fi-digital-noassignment-pdflatex.pdf

...u/compare/expected-fi-digital-someassignment-lualatex.pdf

...u/compare/expected-fi-digital-someassignment-pdflatex.pdf