Update docs/examples/droplet_fusion/droplet_fusion.rst

Co-authored-by: Joep Vanlier <JoepVanlier@users.noreply.github.com>

docs/examples/droplet_fusion/droplet_fusion.rst

@@ -95,7 +95,7 @@ Fit the data and plot the result::
     popt, pcov = curve_fit(relaxation_model, time, force, [0.1, force[0], 0, 0])
     plt.figure()
     plt.plot(time, force)
-    plt.plot(time, relaxation_model(time,*popt), label=fr"$\tau$"  = {popt[0]:0.2f}s')
+    plt.plot(time, relaxation_model(time,*popt), label=fr"$\tau$ = {popt[0]:0.2f}s")
     plt.ylabel(r"x-coordinate ($\mu$m)")
     plt.xlabel("Time (s)")
     plt.legend()