Merge pull request #83 from Keno/fixprint

Fix printing error #82 for polys with complex coefficients

Author: jverzani

src/show.jl

@@ -113,7 +113,7 @@ function printproductsign{T}(io::IO, pj::T, j, mimetype)
 end
 
 function printcoefficient{T}(io::IO, pj::Complex{T}, j, mimetype)
-        
+
     hasreal = abs(real(pj)) > 0
     hasimag = abs(imag(pj)) > 0
 
@@ -123,7 +123,7 @@ function printcoefficient{T}(io::IO, pj::Complex{T}, j, mimetype)
         print(io, ')')
     elseif hasreal
         a = real(pj)
-        (showone(T) || a != one(T)) && show(io, mimetype, a)
+        (j==0 || showone(T) || a != one(T)) && show(io, mimetype, a)
     elseif hasimag
         b = imag(pj)
         (showone(T) || b != one(T)) && show(io,  mimetype, b)

test/runtests.jl

@@ -226,6 +226,8 @@ p = Poly([1,2,3,1])  # leading coefficient of 1
 @test repr(p) == "Poly(1 + 2⋅x + 3⋅x^2 + x^3)"
 p = Poly([1.0, 2.0, 3.0, 1.0])
 @test repr(p) == "Poly(1.0 + 2.0⋅x + 3.0⋅x^2 + 1.0⋅x^3)"
+p = Poly([1, im])
+@test repr(p) == "Poly(1 + im⋅x)"
 p = Poly([1+im, 1-im, -1+im, -1 - im])# minus signs
 @test repr(p) == "Poly((1 + 1im) + (1 - 1im)⋅x - (1 - 1im)⋅x^2 - (1 + 1im)⋅x^3)"