missingsstring does not behave as documented

[haberdashPI]

MWE:

julia> CSV.write("test.csv", DataFrame(;a=[missing,1], c=[2,missing]); missingsstring="NA")   

shell> cat test.csv
a,c
,2
1,

[pdeffebach]

Interestingly, I can only reproduce when using dataframes, not with a vector of named tuples

julia> CSV.write("test.csv", DataFrame(;a=[missing,1], c=[2,missing]); missingsstring="NA")
"test.csv"

shell> cat test.csv
a,c
,2
1,

julia> t = [(a = 1, b = 2), (a = missing, b = 4)];

julia> CSV.write("test.csv", t; missingstring = "NA")
"test.csv"

shell> cat test.csv
a,b
1,2
NA,4

[pdeffebach]

@haberdashPI The issue you face is simply a typo. You want missingstring, rather than missingsstring (you have an extra s)

We can close this issue. However @quinnj should we try to implement stricter keyword argument handling?