Typo in flex6pt kernel

[RaulPPelaez]

Hi,
The factor \beta in the flex6pt kernel is written as

IBMethod/IBKernels/flex6pt.m

Line 36 in 1900042

beta=(9/4)-(3/2)*(K+r.^2)+((22/3)-7*K)*r-(7/3)*r.^3;

However, the article[1] defines \beta as

beta=(9/4)-(3/2)*(K+r.^2)*r+((22/3)-7*K)*r-(7/3)*r.^3;

Notice the missing "r" after (K+r^2).

Not sure if this is a typo in the article or in the code, though.

Best,
Raul.

[1] https://www.sciencedirect.com/science/article/pii/S0021999116300663