Apply suggestions from code review

Co-authored-by: Paul T. Kühner <56360279+schnellerhase@users.noreply.github.com>

Author: jorgensd

demos/demo_Y_bifurcation.py

@@ -9,7 +9,7 @@
 )
 from networks_fenicsx.post_processing import export_functions, extract_global_flux
 
-outdir = Path("results_Y_bifurcation")
+outdir = Path(__file__).parent / "results_Y_bifurcation"
 outdir.mkdir(exist_ok=True, parents=True)
 
 # Create Y bifurcation graph

demos/demo_double_Y_bifurcation.py

@@ -24,7 +24,7 @@ def eval(self, x):
 solver.assemble()
 sol = solver.solve()
 
-print(__file__)
+
 outdir = Path("results_double_Y_bifurcation")
 global_flux = extract_global_flux(network_mesh, sol)
 export_functions(sol, outpath=outdir)