I am knitting a baby shrug and am at the point of divide for fronts. The pattern says (RS) K3, m1, k to end...this is the left front. How do you know when to do a R slant or a L slant? This is right before the pattern tells me to start sleeve shaping. This always confuses me when the pattern just says m1 instead of specifying right or left slant. Thank you for any help.