$ PYTHONPATH=~/devel/pygments/ \
    python3 _tools/pygments2chroma.py pygments.lexers.JuliaLexer \
    > lexers/j/julia_new.go

$ gofmt -s -w lexers/j/julia_new.go 
lexers/j/julia_new.go:41:36: escape sequence is invalid Unicode code point

$ sed -e 's@\\udbff\\udfff@\\U0010ffff@g' -i lexers/j/julia_new.go
$ gofmt -s -w lexers/j/julia_new.go 

# Copy and paste the contents of `Rules{` block from julia_new.go to julia.go
#   since the pygments2chroma.py converter does not create the lazy lexer
#   code format.

$ rm lexers/j/julia_new.go