human
Solve the following python programming problem given the following code:
@ cli.command ('content-file-info', short_help = 'Provides information for a set of lektor files.') 
@ click.option ('as_json', '--json', is_flag = True, help = 'Prints out the data as json.') 
@ click.argument ('files', nargs = (- 1), type = click.Path ()) 
@ pass_context 
def content_file_info_cmd(ctx, files, as_json) : 
    'Given a list of files this returns the information for those files
    in the context of a project.  If the files are from different projects
    an error is generated.
    ' 
    project = None 
    def fail(msg) : 
        if as_json : 
            echo_json ({ 
                'success' : False, 
                'error' : msg, 
}) 
            sys.exit (1) 
raise click.UsageError (('Could not find content file info: %s' % msg)) 
for filename in files : 
        this_project = Project.discover (filename) 
        if (this_project is None) : 
            fail ('no project found') 
if (project is None) : 
            project = this_project 
else : 
            if (project.project_path != this_project.project_path) : 
                fail ('multiple projects') 
if (project is None) : 
        fail ('no file indicated a project') 
project_files = [] 
    for filename in files : 
        content_path = project.content_path_from_filename (filename) 
        if (content_path is not None) : 
            project_files.append (content_path) 
if (not project_files) : 
        fail ('no files resolve in project') 
if as_json : 
        echo_json ({ 
            'success' : True, 
            'project' : project.to_json (), 
            'paths' : project_files, 
}) 
else : 
        click.echo ('Project:') 
        click.echo (('  Name: %s' % project.name)) 
        click.echo (('  File: %s' % project.project_file)) 
        click.echo (('  Tree: %s' % project.tree)) 
        click.echo ('Paths:') 
        for project_file in project_files : 
            click.echo (('  - %s' % this_project)) 

    
    

    Fix the buggy line: click.echo (('  - %s' % this_project))
assistant
#Here is Python code to find content file info: %s' % msg)) 
.

click.echo (('  - %s' % project_file))