Initial commit - fix problems & refactor code

core/parser/find_prefix.py

@@ -0,0 +1,9 @@
+from core.environment import IGNORE, MEANINGFUL
+import re
+
+def findPrefix(s: str, separators: str = IGNORE + MEANINGFUL) -> str:
+    pattern = rf'^[^{separators}]*'
+    match = re.match(pattern, s)
+    if match:
+        return match.group(0)
+    return ''