[gimp] app: fix gimp_appstream_to_pango_markup().

[Jehan <jehanp src gnome org>]

commit 9d3199f14eb070728d1c17b279efe0df2ebc68d7
Author: Jehan <jehan girinstud io>
Date:   Fri Mar 4 18:48:42 2022 +0100

    app: fix gimp_appstream_to_pango_markup().
    
    The newline was added in the wrong place in some cases.

 app/core/gimp-utils.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/app/core/gimp-utils.c b/app/core/gimp-utils.c
index 671a02ce0c..5bd0f493fd 100644
--- a/app/core/gimp-utils.c
+++ b/app/core/gimp-utils.c
@@ -1421,7 +1421,10 @@ appstream_text_end_element (GMarkupParseContext  *context,
     }
   else if (g_strcmp0 (element_name, "li") == 0)
     {
-      g_string_append (state->text, "\n");
+      if (state->original)
+        g_string_append (state->original, "\n");
+      else
+        g_string_append (state->text, "\n");
     }
 
   if (state->foreign_level > state->level)