Update tools.py

tools.py

@@ -2,7 +2,7 @@ import plotly.graph_objects as go
 import plotly.express as px
 import numpy as np
 
-ef plot_3D_invfitness(trait, fitness, resident, range, color="RdBu"):
+def plot_3D_invfitness(trait, fitness, resident, range, color="RdBu"):
     X, Y = np.meshgrid(trait, trait)
     f_projection = (np.min(fitness) - 0.5) * np.ones(fitness.shape)
     axis = dict(