deleting account throws an error

Error:

I, [2017-06-19T11:07:27.682865 #32629]  INFO -- :   Rendered accounts/delete.html.haml within layouts/application (2.3ms)
I, [2017-06-19T11:07:27.683253 #32629]  INFO -- : Completed 500 Internal Server Error in 49ms (ActiveRecord: 1.2ms)
F, [2017-06-19T11:07:27.685117 #32629] FATAL -- :
SyntaxError (/var/www/schleuder-web/app/views/accounts/delete.html.haml:1: syntax error, unexpected tSTRING_BEG, expecting keyword_end
...uffer.new rescue nil;; @title "Delete account #{@account}"
...                               ^):
  app/views/accounts/delete.html.haml:1: syntax error, unexpected tSTRING_BEG, expecting keyword_end