fix tests

Author: SimonDanisch

README.md

@@ -21,4 +21,4 @@ myarray = zeros(UInt8,100,100)
 renderstring!(myarray, "hello", face, (10,10), 90, 10, halign=:hright)
 ```
 
-credits to @aaalexandrov from whom most of the code stems.
+credits to @aaalexandrov from whom most of the early code comes.

test/runtests.jl

@@ -51,7 +51,6 @@ a = renderstring!(
     50,
     valign = :vcenter,
 )
-
 @test all(a[vcat(1:5, 16:end), :] .== 0)
 @test any(a[6:15, :] .!= 0)
 a = renderstring!(
@@ -74,8 +73,7 @@ a = renderstring!(
     50,
     valign = :vbottom,
 )
-
-@test any(a[1
+@test any(a[1:10, :] .!= 0)
 @test all(a[11:20, :] .== 0)
 a = renderstring!(
     zeros(UInt8, 20, 100),