added abs(::uwreal)

src/juobs_linalg.jl

@@ -859,9 +859,31 @@ function Base.getindex(uw::uwreal, ii::Int64)
     idx = getindex(value(uw), ii)
     return  uw # uwreal([getindex(value(uw), kwargs...), err(uw)], " ")
 end
+
+"""
+    Base.abs2(uw::uwreal)
+
+Return the square absolute value.
+
+## Warning
+
+Previously this function returned the absolute value of `uw`, not the square absolute value.
+The function was changed to make it consistent with `Base.abs2()` in Julia.
+When used, a warning is printed to informe of this change future users, feel free to remove the warning
+from your branch!
+"""
 function Base.abs2(uw::uwreal)
-    return (uw^2)^0.5
+    @warn "This function was updated by Antonino to make it consisted with the Julia version of it.
+          Check the documentation for info and then feel free to comment out this warning in your branch"
+    return uw^2
 end
+"""
+    Base.abs(uw::uwreal)
+
+Return the absolute value of `uw` by taking the square root of `uw^2`.
+"""
+Base.abs(uw::uwreal) =  sqrt(uw^2);
+
 """
 Base.:*(x::uwreal, y::Matrix{uwreal})