Fix flake8

bilby/core/sampler/ptemcee.py

@@ -815,8 +815,7 @@ def compute_evidence(sampler, outdir, label, nburn, thin, make_plots=True):
 
         ax2.semilogx(min_betas, evidence, "-o")
         ax2.set_ylabel(
-            r"$\int_{\beta_{min}}^{\beta=1}"
-            + r"\langle \log(\mathcal{L})\rangle d\beta$",
+            r"$\int_{\beta_{min}}^{\beta=1}" + r"\langle \log(\mathcal{L})\rangle d\beta$",
             size=16,
         )
         ax2.set_xlabel(r"$\beta_{min}$")