juobs_tools minor changes

doc updated + minor redefinition

src/juobs_tools.jl

@@ -141,7 +141,7 @@ Computes the results of a linear interpolation/extrapolation in the y axis
 y_lin_fit(par::Vector{uwreal}, x::Union{uwreal, Float64}) = par[1] + par[2] * x
 
 @doc raw"""
-fit_routine(model::Function, ydata::Array{uwreal}, param::Int64=3)
+fit_routine(model::Function, xdata::Array{<:Real}, ydata::Array{uwreal}, param::Int64=3)
 
 Given a model function with a number param of parameters and an array of uwreal,
 this function fit ydata with the given model and print  fit information
@@ -155,7 +155,7 @@ function fit_routine(model::Function, xdata::Array{<:Real}, ydata::Array{uwreal}
     yer = err.(ydata)
     chisq = gen_chisq(model, xdata, yer)
     fit = curve_fit(model, xdata, yval, 1.0 ./ yer.^2, fill(0.5, param))
-    isnothing(wpm) ? (upar, chi_exp) = fit_error(chisq, coef(fit), ydata) : (upar, chi_exp) = fit_error(chisq, coef(fit), ydata, wpm)
+    (upar, chi_exp) = isnothing(wpm) ? fit_error(chisq, coef(fit), ydata) : fit_error(chisq, coef(fit), ydata, wpm)
     for i = 1:length(upar)
         uwerr(upar[i])
         print("\n Fit parameter: ", i, ": ")