From 21de086162254240a016bc816bc30bc3923945aa Mon Sep 17 00:00:00 2001
From: "Mohammed S. Yaseen" <51242349+mohasarc@users.noreply.github.com>
Date: Mon, 26 Jan 2026 09:24:38 +0000
Subject: [PATCH] use join for section text construction

---
 src/endf/material.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/endf/material.py b/src/endf/material.py
index 3965603..fae102f 100644
--- a/src/endf/material.py
+++ b/src/endf/material.py
@@ -153,14 +153,14 @@ def __init__(self, filename_or_obj: Union[PathLike, TextIO], encoding: Optional[
                 fh.readline()
                 break
 
-            section_text = ''
+            section_lines = []
             while True:
                 line = fh.readline()
                 if line[72:75] == '  0':
                     break
                 else:
-                    section_text += line
-            self.section_text[MF, MT] = section_text
+                    section_lines.append(line)
+            self.section_text[MF, MT] = "".join(section_lines)
 
         if need_to_close:
             fh.close()