Fix linewrapper ellipsis inifinite loop

[Ketler13]

Problem

If linewidth in linewrapper is too small even for just ellipsis, the while-loop starts and never ends

Solution

Do while-loop till buffer is not empty string. After while-loop check if there is enough space to contain buffer and ellipsis, and only if this condition is true, add ellipsis to buffer

[alafr]

Thanks for the fix.