关于 shell 字符串拼接问题

def get_attr_by(path,name)
    `"/usr/libexec/PlistBuddy -c  'print #{name}' #{path}"`
end

这段代码报错

sh: /usr/libexec/PlistBuddy -c  'print CFBundleName' test/Payload/mysysy.app/Info.plist: No such file or directory

而下面是正常的

def get_attr_by(path,name)
    cmd = "/usr/libexec/PlistBuddy -c  'print #{name}' #{path}"
    `#{cmd}`
end

百思不得，求各位帮忙给个解释