From 169da094241d6ef83f730568049c79906aa6527b Mon Sep 17 00:00:00 2001
From: David Lawrence Ramsey <pooka109@gmail.com>
Date: Sun, 12 Nov 2017 11:45:53 -0600
Subject: [PATCH] files: don't change file format when inserting into an
 existing buffer

This fixes https://savannah.gnu.org/bugs/?52392.
---
 src/files.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/files.c b/src/files.c
index fd60df80..a8de66bf 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1031,6 +1031,7 @@ void do_insertfile(void)
     char *given = mallocstrcpy(NULL, "");
 	/* The last answer the user typed at the statusbar prompt. */
 #ifndef NANO_TINY
+    file_format original_fmt = openfile->fmt;
     bool execute = FALSE;
 #endif
 
@@ -1177,7 +1178,10 @@ void do_insertfile(void)
 		if (openfile->current->lineno != was_current_lineno ||
 			openfile->current_x != was_current_x)
 		    set_modified();
-
+#ifndef NANO_TINY
+		/* Don't change the format of the current file. */
+		openfile->fmt = original_fmt;
+#endif
 		refresh_needed = TRUE;
 	    }
 
-- 
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