meson: drop parens when appending to list

Meson does not care either way, so let's use the simpler syntax. And files()
already gives a list, so nesting this in a list wouldn't be necessary even
if meson did not flatten everything.

src/boot/efi/meson.build

@@ -147,10 +147,10 @@ if have_gnu_efi
                                                  + compile_args,
                                        depend_files : efi_headers)
                 if (common_sources + systemd_boot_sources).contains(file)
-                        systemd_boot_objects += [o_file]
+                        systemd_boot_objects += o_file
                 endif
                 if (common_sources + stub_sources).contains(file)
-                        stub_objects += [o_file]
+                        stub_objects += o_file
                 endif
         endforeach
 

src/resolve/meson.build

@@ -143,11 +143,13 @@ systemd_resolved_sources += [resolved_gperf_c, resolved_dnssd_gperf_c]
 systemd_resolved_dependencies = [threads, libgpg_error, libm, libidn]
 if conf.get('ENABLE_DNS_OVER_TLS') == 1
         if conf.get('DNS_OVER_TLS_USE_GNUTLS') == 1
-                systemd_resolved_sources += [files(['resolved-dnstls-gnutls.c', 'resolved-dnstls-gnutls.h'])]
-                systemd_resolved_dependencies += [libgnutls]
+                systemd_resolved_sources += files('resolved-dnstls-gnutls.c',
+                                                  'resolved-dnstls-gnutls.h')
+                systemd_resolved_dependencies += libgnutls
         elif conf.get('DNS_OVER_TLS_USE_OPENSSL') == 1
-                systemd_resolved_sources += [files(['resolved-dnstls-openssl.c', 'resolved-dnstls-openssl.h'])]
-                systemd_resolved_dependencies += [libopenssl]
+                systemd_resolved_sources += files('resolved-dnstls-openssl.c',
+                                                  'resolved-dnstls-openssl.h')
+                systemd_resolved_dependencies += libopenssl
         else
                 error('unknown dependency for supporting DNS-over-TLS')
         endif

src/shared/meson.build

@@ -106,7 +106,7 @@ shared_sources = files('''
 '''.split())
 
 test_tables_h = files('test-tables.h')
-shared_sources += [test_tables_h]
+shared_sources += test_tables_h
 
 if conf.get('HAVE_ACL') == 1
         shared_sources += files('acl-util.c')