Changed install template system call to account for spaces in path (#137

)

* Changed install template system call to account for spaces in path

`path` may contain a space. In the old code this broke the system
call.New version is in line with other library install templates (e.g.
importmap).

* Remove needless curly braces

---------

Co-authored-by: Marek Hilton <marek.hilton15@imperial.ic.ac.uk>
Co-authored-by: David Heinemeier Hansson <david@hey.com>

lib/tasks/stimulus_tasks.rake

@@ -4,7 +4,7 @@ module Stimulus
   module Tasks
     extend self
     def run_stimulus_install_template(path)
-      system "#{RbConfig.ruby} ./bin/rails app:template LOCATION=#{File.expand_path("../install/#{path}.rb",  __dir__)}"
+      system RbConfig.ruby, "./bin/rails", "app:template", "LOCATION=#{File.expand_path("../install/#{path}.rb",  __dir__)}"
     end
 
     def using_bun?