--- a/@mp/atanh.m
+++ b/@mp/atanh.m
@@ -1,4 +1,4 @@
-function out=atanh(x)
+function out = atanh(x)
 
-out=(log(1+x)-log(1-x))/2;
+out = .5*(log (1+x) - log (1-x));