fix(test): account for Masses section in dpdata>=1.0.2 lammps output

dpdata 1.0.2 started emitting a "Masses" section in the lammps/lmp
output, which broke the exact-string comparison in
TestConfGenerator.test_make_conf_list on the Python 3.13 CI job (3.9
gets dpdata 1.0.1, which has no Masses section, so it kept passing).

Keep the strict string comparison but include the Masses block in the
expected content when the installed dpdata is >= 1.0.2.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Han Wang

tests/conf/test_alloy_conf.py

@@ -1,6 +1,7 @@
 import json
 import os
 import random
+import re
 import shutil
 import tempfile
 import unittest
@@ -23,8 +24,20 @@
 # isort: on
 
 
+# dpdata >= 1.0.2 emits a "Masses" section in the lammps/lmp output
+_dpdata_ver = tuple(int(x) for x in re.findall(r"\d+", dpdata.__version__)[:3])
+_lmp_masses = (
+    "Masses\n\n     1   26.9815386000 # Al\n     2   24.3050000000 # Mg\n\n"
+    if _dpdata_ver >= (1, 0, 2)
+    else ""
+)
+
 ofc0 = "\n1 atoms\n2 atom types\n   0.0000000000    2.0000000000 xlo xhi\n   0.0000000000    2.0000000000 ylo yhi\n   0.0000000000    2.0000000000 zlo zhi\n   0.0000000000    0.0000000000    0.0000000000 xy xz yz\n\nAtoms # atomic\n\n     1      1    0.0000000000    0.0000000000    0.0000000000\n"
-ofc1 = "\n1 atoms\n2 atom types\n   0.0000000000    3.0000000000 xlo xhi\n   0.0000000000    3.0000000000 ylo yhi\n   0.0000000000    3.0000000000 zlo zhi\n   0.0000000000    0.0000000000    0.0000000000 xy xz yz\n\nAtoms # atomic\n\n     1      2    0.0000000000    0.0000000000    0.0000000000\n"
+ofc1 = (
+    "\n1 atoms\n2 atom types\n   0.0000000000    3.0000000000 xlo xhi\n   0.0000000000    3.0000000000 ylo yhi\n   0.0000000000    3.0000000000 zlo zhi\n   0.0000000000    0.0000000000    0.0000000000 xy xz yz\n\n"
+    + _lmp_masses
+    + "Atoms # atomic\n\n     1      2    0.0000000000    0.0000000000    0.0000000000\n"
+)
 ofc2 = "\n1 atoms\n2 atom types\n   0.0000000000    4.0000000000 xlo xhi\n   0.0000000000    4.0000000000 ylo yhi\n   0.0000000000    4.0000000000 zlo zhi\n   0.0000000000    0.0000000000    0.0000000000 xy xz yz\n\nAtoms # atomic\n\n     1      2    0.0000000000    0.0000000000    0.0000000000\n"