flutter.updateScript: fix file format

mivorasu 9e4a6210 be500d94

Changed files
+3 -1
pkgs
development
compilers
flutter
update
+3 -1
pkgs/development/compilers/flutter/update/update.py
···
new_content = [
"flutterPackages-bin = recurseIntoAttrs (callPackage ../development/compilers/flutter { });",
-
"flutterPackages-source = recurseIntoAttrs (callPackage ../development/compilers/flutter { useNixpkgsEngine = true; });",
+
"flutterPackages-source = recurseIntoAttrs (",
+
" callPackage ../development/compilers/flutter { useNixpkgsEngine = true; }",
+
");",
"flutterPackages = flutterPackages-bin;",
"flutter = flutterPackages.stable;",
] + [