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pina/problem/zoo/allen_cahn.py

@@ -49,7 +49,7 @@ class AllenCahnProblem(TimeDependentProblem, SpatialProblem):
         Computer Methods in Applied Mechanics and Engineering 421 (2024): 116805
         DOI: `10.1016/
         j.cma.2024.116805 <https://doi.org/10.1016/j.cma.2024.116805>`_.
-    
+
     :Example:
         >>> problem = AllenCahnProblem()
     """

pina/problem/zoo/helmholtz.py

@@ -53,7 +53,7 @@ class HelmholtzProblem(SpatialProblem):
         **Original reference**: Si, Chenhao, et al. *Complex Physics-Informed
         Neural Network.* arXiv preprint arXiv:2502.04917 (2025).
         DOI: `arXiv:2502.04917 <https://arxiv.org/abs/2502.04917>`_.
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+
     :Example:
         >>> problem = HelmholtzProblem()
     """