fix: make filename more user-friendly

Signed-off-by: Akhil Narang <me@akhilnarang.dev>

frappe/utils/print_format.py

@@ -83,6 +83,7 @@ def _download_multi_pdf(
 	PDF: A PDF generated by the concatenation of the mentioned input docs
 
 	"""
+	filename = ""
 
 	import json
 
@@ -94,6 +95,7 @@ def _download_multi_pdf(
 	if not isinstance(doctype, dict):
 		result = json.loads(name)
 		total_docs = len(result)
+		filename = f"{doctype}_"
 
 		# Concatenating pdf files
 		for idx, ss in enumerate(result):
@@ -123,6 +125,7 @@ def _download_multi_pdf(
 		total_docs = sum([len(doctype[dt]) for dt in doctype])
 		count = 1
 		for doctype_name in doctype:
+			filename += f"{doctype_name}_"
 			for doc_name in doctype[doctype_name]:
 				try:
 					pdf_writer = frappe.get_print(
@@ -156,7 +159,7 @@ def _download_multi_pdf(
 		_file = frappe.get_doc(
 			{
 				"doctype": "File",
-				"file_name": f"{task_id}.pdf",
+				"file_name": f"{filename}{task_id}.pdf",
 				"content": merged_pdf.getvalue(),
 				"is_private": 1,
 			}