ledger: make verify script cwd-independent

wizard-work/ledger/verify_arxiv_fresh.py

@@ -9,9 +9,13 @@ import json
 import re
 import sys
 
-CSV_PATH = "arxiv-lg-recent.csv"
-JSON_PATH = "arxiv-lg-recent.json"
-MD_PATH = "arxiv-lg-recent.md"
+import os
+import sys
+
+BASE = os.path.dirname(os.path.abspath(__file__))
+CSV_PATH = os.path.join(BASE, "arxiv-lg-recent.csv")
+JSON_PATH = os.path.join(BASE, "arxiv-lg-recent.json")
+MD_PATH = os.path.join(BASE, "arxiv-lg-recent.md")
 ARXIV_ID_RE = re.compile(r"^\d{4}\.\d{5}$")
 DATE_RE = re.compile(r"^\d{4}-\d{2}-\d{2}$")
 FIELDS = ["arxiv_id", "title", "authors", "published", "abstract"]