Corrected printing of unity roots

Author: jagot

src/roots.jl

@@ -1,5 +1,8 @@
 function to_root(io::IO, root, val)
-    root == 1 && return val
+    if root == 1
+        write(io, string(val))
+        return
+    end
     if root == 3
         print(io, '∛')
     elseif root == 4

test/runtests.jl

@@ -25,3 +25,5 @@ latexstring = "\\bf{boldface} \\it{italic} \\bb{blackboard} \\cal{calligraphic}
 @test to_root(3,"542") == "∛5̅4̅2̅"
 @test to_root(4,"542") == "∜5̅4̅2̅"
 @test to_root(17,"542") == "¹⁷√5̅4̅2̅"
+@test to_root(1, "1") == "1"
+@test to_root(1, "-1") == "-1"