Instructions on Panagram Exercise are incorrect

[janhampe]

The Panagram exercise's instructions say that the tests will only input ASCII characters, this is wrong. Test 14 specifically tests the solution on its handling of non ASCII characters.

[Francehelder]

Test 14 is wrong.
I made my code to work with non-ASCII letters, but fails.

@testset "pangram with more than 26 letters (if case sensitive)" begin
    @test ispangram("the 1 quick brown fox jumps Over the 2 lazy dogs")
end
@testset "letters that aren't part of ASCII" begin
    @test !ispangram("the 1 qüick bröwn föx jümps över the 2 läzy dögs")
end

[cmcaine]

@Francehelder can you provide the code for your solution, please? Do you think ispangram("the 1 qüick bröwn föx jümps över the 2 läzy dögs") should return true or false?