File 1237-Teach-make-clean-in-sys-doc-dir-not-to-break-the-sou.patch of Package erlang

From 3b3f415988de2defcc6d3146acb3d41dc6b333e8 Mon Sep 17 00:00:00 2001
From: Rickard Green <rickard@erlang.org>
Date: Wed, 5 Apr 2023 15:09:15 +0200
Subject: [PATCH 1/3] Teach 'make clean' in sys doc dir not to break the source
 tree

---
 system/doc/installation_guide/Makefile | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/system/doc/installation_guide/Makefile b/system/doc/installation_guide/Makefile
index 9cc107ab10..17674c614c 100644
--- a/system/doc/installation_guide/Makefile
+++ b/system/doc/installation_guide/Makefile
@@ -114,9 +114,8 @@ debug opt:
 clean clean_docs:
 	rm -f $(GENERATED_XML_FILES)
 	rm -f $(XMLDIR)/*.xml
-	rm -f $(HTMLDIR)/*.gif $(HTMLDIR)/*.html
+	rm -f $(HTMLDIR)/*/*.gif $(HTMLDIR)/*/*.html
 	rm -f $(XML_GEN_FILES)
-	rm -rf $(HTMLDIR)
 	rm -f $(TOP_PDF_FILE) $(TOP_PDF_FILE:%.pdf=%.fo)
 	rm -f errs core *~ 
 
-- 
2.35.3