Update app.py

app.py

@@ -68,12 +68,12 @@ def get_azure_client() -> Optional[DocumentAnalysisClient]:
 
 # --- Regex patterns for text-based PDF extraction ---
 INVOICE_NO_RE = re.compile(
-    r"(? : Inv(? :oice)?\s*No\. ?|Invoice\s*No\. ?|Bill\s*No\.?|BILL\s*NO\.?|BILL\s*NO)\s*[:\-]?\s*([A-Za-z0-9\-/]+)",
+    r"(?: Inv(?:Inoice)?\s*No\. ?|Invoice\s*No\. ?|Bill\s*No\.?|BILL\s*NO\.?|BILL\s*NO)\s*[:\-]?\s*([A-Za-z0-9\-/]+)",
     re.IGNORECASE,
 )
 
 PREFIXED_INVOICE_RE = re.compile(
-    r"\b([A-Z]{2,4}[-/]\d{4,}(? :/\d+)?[A-Z]*)\b"
+    r"\b([A-Z]{2,4}[-/]\d{4,}(?:/\d+)?[A-Z]*)\b"
 )
 
 GST_LIKE_RE = re.compile(r"\b(GST[-\s]?\d+[A-Za-z0-9-]*)\b", re.IGNORECASE)