fix: Replace newlines with spaces before evaluation of condition and formula (#21165)

diff --git a/erpnext/hr/doctype/salary_slip/salary_slip.py b/erpnext/hr/doctype/salary_slip/salary_slip.py
index d03a3dd..c637215 100644
--- a/erpnext/hr/doctype/salary_slip/salary_slip.py
+++ b/erpnext/hr/doctype/salary_slip/salary_slip.py
@@ -356,13 +356,13 @@
 
 	def eval_condition_and_formula(self, d, data):
 		try:
-			condition = d.condition.strip() if d.condition else None
+			condition = d.condition.strip().replace("\n", " ") if d.condition else None
 			if condition:
 				if not frappe.safe_eval(condition, self.whitelisted_globals, data):
 					return None
 			amount = d.amount
 			if d.amount_based_on_formula:
-				formula = d.formula.strip() if d.formula else None
+				formula = d.formula.strip().replace("\n", " ") if d.formula else None
 				if formula:
 					amount = flt(frappe.safe_eval(formula, self.whitelisted_globals, data), d.precision("amount"))
 			if amount: