chore: fix typo

Author: ycexiao

src/diffpy/morph/refine.py

@@ -87,8 +87,8 @@ def _residual(self, pvals):
             raise ValueError(
                 f"\nNumber of shared grid points: {len(rvec)}\n"
                 f"Number of parameters: {len(pvals)}\n"
-                "Not enough shared grid points between morphed function "
-                "between morphed function and target function to fit "
+                "Not enough shared grid points "
+                "between the morphed function and the target function to fit "
                 "the chosen parameters.\n"
                 "Please make sure the overlapping domain between the morphed "
                 "function and the target function is sufficiently large, or "

tests/test_refine.py

@@ -196,8 +196,8 @@ def test_refine_grid_bad(self, user_filesystem):
         expected_error_message = (
             "\nNumber of shared grid points: 2\n"
             "Number of parameters: 3\n"
-            "Not enough shared grid points between morphed function "
-            "between morphed function and target function to fit "
+            "Not enough shared grid points "
+            "between the morphed function and the target function to fit "
             "the chosen parameters.\n"
             "Please make sure the overlapping domain between the morphed "
             "function and the target function is sufficiently large, or "