Typo on Donaich model causing error

[P-Mousley]

There is a small typo in the gui.py file where it loads in the peak options on line 1544

thorondor/thorondor/gui.py

Line 1544 in 4471472

("Donaich", DoniachModel)

it reads ("Donaich", DoniachModel)
when it should read ("Donaich", DonaichModel)

[DSimonne]

Hi,

OK I thought I had corrected that thanks I will check it out and correct it ASAP =)

[DSimonne]

The error is in the label but not in the function name:

It's Doniach, thank you !

[DSimonne]

Check your version of lmfit if you have an error, it's probably an old one. See lmfit/lmfit-py#634