fix: compare md5 when keeping Recalbox text

The attribute pattern took letters only, so md5 never entered the comparison and an element whose digest the truth corrects kept Recalbox's text. A test written before the change caught it. The RetroDECK fixture now names the core that reads its addition, as the placement rule requires.

scripts/exporter/recalbox_exporter.py

@@ -35,7 +35,7 @@ SCHEMA_URL = (
 )
 
 
-_ATTRIBUTE = re.compile(r'([A-Za-z]+)\s*=\s*"([^"]*)"')
+_ATTRIBUTE = re.compile(r'([A-Za-z][A-Za-z0-9]*)\s*=\s*"([^"]*)"')
 _SYSTEM_BLOCK = re.compile(r"<system\b.*?</system>", re.S)
 _BIOS_ELEMENT = re.compile(r"[ \t]*<bios\b.*?/>", re.S)
 

tests/test_export_counts.py

@@ -128,7 +128,8 @@ class RetroDeckWritesWhatItCounts(unittest.TestCase):
     def test_addition_goes_to_the_system_component(self):
         declared = NativeFile("a.bin", "bios/a.bin", "psx",
                               platform={"component": "duckstation", "md5": A})
-        added = NativeFile("b.bin", "bios/b.bin", "psx", truth={"md5": B})
+        added = NativeFile("b.bin", "bios/b.bin", "psx", truth={"md5": B},
+                           runners=[(True, "duckstation")])
         spread = NativeSystem("amiga", files=[
             NativeFile("k1", "bios/k1", "amiga", platform={"component": "retroarch"}),
             NativeFile("k2", "bios/k2", "amiga", platform={"component": "puae"}),