Fix gallery build in docs.

These fixes were all informed by the sphinx warnings during build.
The labels weren't being applied correctly in the gallery and made
it look bad. Looks good now.

doc/conf.py

@@ -24,6 +24,7 @@
 All configuration values have a default; values that are commented out
 serve to show the default.
 """
+
 # ruff: noqa: E402
 import datetime
 import inspect
@@ -359,6 +360,11 @@ def setup(app):
 exclude_patterns = [
     "**/Python27*",
     "**/ccl*",
+    # prevent sphinx-gallery from causing duplicate source file errors
+    "gallery/**/*.ipynb",
+    "gallery/**/*.md5",
+    "gallery/**/*.zip",
+    "gallery/**/*.json",
     "**.ipynb_checkpoints",
     "_build",
 ]  # , '**/tests*']

doc/gallery-src/framework/run_chartOfNuclides.py

@@ -22,7 +22,9 @@
 
     Our :ref:`extended tutorial for nuclides </tutorials/nuclide_demo.ipynb>` and
     detailed :py:mod:`nucDirectory docs <armi.nucDirectory>` may also be of interest.
+
 """
+
 import matplotlib.pyplot as plt
 
 from armi import configure

doc/gallery-src/framework/run_fuelManagement.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 """
 Fuel management in a LWR.
+=========================
 
 Demo of locating and swapping assemblies in a core with Cartesian geometry. Given a burnup
 distribution, this swaps high burnup assemblies with low ones.
@@ -26,6 +27,7 @@
 ARMI to do fuel management. Thus, this example applies a dummy burnup distribution for
 demonstration purposes.
 """
+
 # Tell the gallery to feature the 2nd image
 # sphinx_gallery_thumbnail_number = 2
 import math