augmented assignment seems to use different function name resolution than normal calls

[timfennis]

Surprisingly the code below works because apparently calling a function searches the scopes for a function that matches:

let min = 1000;

min = min(min, 5);

print(min);

Considering this the following example is even more surprising since it gives a borrowchecker error:

let min = 1000;
min min= 5;
print(min);