Progress bar print mult colums when desc option contains chinese character

[Drake-Z]

I use tqdm 4.19.4 in Win10 Python3.6.2, I found that if there have chinese character in tqdm desc option, the progress bar will print multiple columns
like this :

code:

from tqdm import tqdm
from time import sleep
def test(desc):
    for files in tqdm(range(200), desc=desc):
        sleep(0.001)
test("test")
test("测试")

But if add ncols option will not have this problem.

[casperdcl]

relevant PR: #410