Refactor error handling for s_value check

Author: Tushar-R-Tyagi

maths/laplace_transformation.py

@@ -50,10 +50,9 @@ def laplace_transform(
         raise ValueError("delta_t must be a positive value.")
     if function_values.size == 0:
         raise ValueError("function_values array cannot be empty.")
-    if s_value < 0:
-        raise ValueError(
-            f"s_value must be non-negative for this implementation, got{s_value}."
-        )
+   if s_value < 0:
+    error_msg = f"s_value must be non-negative for this implementation, got {s_value}."
+    raise ValueError(error_msg)
 
     # Time vector corresponding to the function values
     time_vector = np.linspace(