ignore blank lines (I'm not sure this is a good thing *in* the file, but ignoring blank lines at the end is a good idea)

lua/csv.lua

@@ -285,8 +285,10 @@ local function separated_values_iterator(file, parameters)
       elseif parameters.header and not header then
         header = fields
       else
+        if fields[1] ~= "" or fields[2] then  -- ignore blank lines
           coroutine.yield(fields, starts)
         end
+      end
       field_count, fields, starts = 0, {}, {}
     end
 

lua/test.lua

@@ -50,6 +50,9 @@ apple:four,charlie:60]],
   apple = { name = "ALPHA", transform = string.lower },
   charlie = { transform = function(x) return tonumber(x) * 10 end }}})
 
+test("../test-data/blank-line.csv", [[
+this,file,ends,with,a,blank,line]])
+
 
 if errors == 0 then
   io.stdout:write("Passed\n")

test-data/blank-line.csv

@@ -0,0 +1 @@
+this,file,ends,with,a,blank,line