Merge branch 'main' into release/2.0.2

Author: codie3611

.gitignore

@@ -74,4 +74,6 @@ venv.bak/
 
 # Ignore generated changelog
 CHANGELOG.md
-test/read_write_test.py
+
+# Custom test file
+test/read_write_test.py

lasso/dyna/d3plot.py

@@ -674,8 +674,14 @@ def build_header(self):
         ):
             new_header["ioshl3"] = 1000
         else:
-            # new_header["ioshl3"] = 999
-            new_header["ioshl3"] = 0
+            # See https://github.com/open-lasso-python/lasso-python/issues/39
+            if (
+                ArrayType.element_shell_thickness in self.d3plot.arrays
+                or ArrayType.element_shell_internal_energy in self.d3plot.arrays
+            ):
+                new_header["ioshl3"] = 999
+            else:
+                new_header["ioshl3"] = 0
 
         if n_shells == 0:
             new_header["ioshl3"] = (
@@ -6163,7 +6169,7 @@ def plot(
     def write_d3plot(
         self, filepath: Union[str, BinaryIO], block_size_bytes: int = 2048, single_file: bool = True
     ):
-        """Write a d3plot file again **(pro version only)**
+        """Write a d3plot file again
 
         Parameters
         ----------