Refactor Ersilia test command

.devcontainer/devcontainer.json

@@ -36,7 +36,8 @@
                 "ms-python.python",
                 "ms-python.vscode-pylance",
                 "mohsen1.prettify-json",
-                "redhat.vscode-yaml"
+                "redhat.vscode-yaml",
+                "mintchipleaf.fairyfloss"
             ]
         }
     }

ersilia/io/input.py

@@ -273,4 +273,6 @@ def example(self, n_samples, file_name, simple, try_predefined):
             predefined_done = self.predefined_example(file_name)
         if not predefined_done:
             self.logger.debug("Randomly sampling input")
-            self.random_example(n_samples=n_samples, file_name=file_name, simple=simple)
+            return self.random_example(n_samples=n_samples, file_name=file_name, simple=simple)
+        with open(file_name, "r") as f:
+            return f.read()