ci: fix YAML syntax in diagnose step (heredoc for python)

Author: peng.li24

.github/workflows/ci.yml

@@ -52,25 +52,26 @@ jobs:
 
       - name: Diagnose numpy symbols
         run: |
-          python -c "
-import numpy, subprocess, glob, os, ctypes
+          python - <<'PYEOF'
+import numpy, subprocess, glob, os
 print('numpy version:', numpy.__version__)
-# Find _multiarray_umath.so
 so = None
 for d in ['core', '_core']:
     for f in glob.glob(os.path.join(os.path.dirname(numpy.__file__), d, '_multiarray_umath*.so')):
         so = f; break
-    if so: break
+    if so:
+        break
 print('numpy so:', so)
 if so:
     r = subprocess.run(['nm', '-D', so], capture_output=True, text=True)
     for sym in ['npy_exp', '__svml_exp8', 'npy_log', 'cblas_sdot64_', 'cblas_sdot']:
-        found = any(sym in l for l in r.stdout.splitlines())
-        print(f'  {sym}: {\"found\" if found else \"NOT found\"}')
-"
+        found = any(sym in line for line in r.stdout.splitlines())
+        status = 'found' if found else 'NOT found'
+        print('  ' + sym + ': ' + status)
+PYEOF
           grep -q avx512f /proc/cpuinfo \
-            && echo "✓ AVX-512 supported" \
-            || echo "⚠ AVX-512 not in cpuinfo"
+            && echo "AVX-512: present in cpuinfo" \
+            || echo "AVX-512: NOT in cpuinfo"
 
       - name: Configure
         run: cmake -S tests -B tests/build -DCMAKE_BUILD_TYPE=Release