more void -> null renames

src/script/modules/_test.meson

@@ -104,9 +104,9 @@ func returns_string() -> str
     return '10'
 endfunc
 
-# this should return void and muon should not raise an error stating that
+# this should return null and muon should not raise an error stating that
 # it expected a return of 'str' due to the internal call to `returns_string`
-func returns_void()
+func returns_null()
     val_str = returns_string()
     message(val_str)
 endfunc
@@ -131,6 +131,6 @@ return {
     'glob_arg': glob_arg,
     'typed_list': typed_list,
     'multi_return': multi_return,
-    'returns_void': returns_void,
+    'returns_null': returns_null,
     'project': project,
 }

src/script/modules/gnome.meson

@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: sewn <[email protected]>
 # SPDX-License-Identifier: GPL-3.0-only
 
-# TODO: investigate void kwarg in custom_target
+# TODO: investigate null kwarg in custom_target
 
 fs = import('fs')
 

src/script/modules/i18n.meson

@@ -61,7 +61,7 @@ func read_linguas(source_dir str) -> list[any]
     return languages
 endfunc
 
-func get_data_dirs(source_dir str, dirs list[str]|void) -> str
+func get_data_dirs(source_dir str, dirs list[str]|null) -> str
 
     if is_null(dirs)
         return ''

tests/project/muon/script_module/meson.build

@@ -85,7 +85,7 @@ assert(m.multi_return('b') == 2)
 assert(m.multi_return('c') == 0)
 
 # test internal calls not changing interpreter state.
-m.returns_void()
+m.returns_null()
 
 # test meson.project()
 p(m.project())