[gedit] build: gedit/: simplify install_headers() call

[Sébastien Wilmet <swilmet src gnome org>]

commit a1a1c5454b02aaf4a71d33ff3f31f4b825511a2b
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Mar 16 15:14:02 2020 +0100

    build: gedit/: simplify install_headers() call

 gedit/meson.build | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)
---
diff --git a/gedit/meson.build b/gedit/meson.build
index 4393c1d34..9d8422dd8 100644
--- a/gedit/meson.build
+++ b/gedit/meson.build
@@ -165,12 +165,7 @@ libgedit_dep_sources = []
 
 install_headers(
   libgedit_public_h,
-  install_dir: join_paths(
-    get_option('prefix'),
-    get_option('includedir'),
-    package_string,
-    'gedit'
-  )
+  subdir: 'gedit-@0@'.format(api_version) / 'gedit'
 )
 
 libgedit_sha = shared_library(