在客户端访问subversion版本库时出现这个错误：
svnserve.conf:27: Option expected
为什么会出现这个错误呢，就是因为subversion读取配置文件svnserve.conf时，无法识别有前置空格的配置文件，如
### the file's location is relative to the directory containing
### this configuration file.
### If SASL is enabled (see below), this file will NOT be used.
### Uncomment the line below to use the default password file. password-db = passwd
### The authz-db option controls the location of the authorization
### rules for path-based access control. Unless you specify a path
### starting with a /, the file's location is relative to the the
### directory containing this file. If you don't specify an
### authz-db, no path-based access control is done.
### Uncomment the line below to use the default authorization file.
authz-db = authz (前面有空格，把空格去了就可以了)
authz-db = authz （这样即可！）
### This option specifies the authentication realm of the repository.
### If two repositories have the same authentication realm, they should
### have the same password database, and vice versa. The default realm 像上面的配置文件中，authz-db = authz 是顶行的，没问题，若authz-db = authz 就存在前置空格，会导致这个错误。 要避免出现这个错误，应该在去掉这些行前的#时，也要顺手去掉前面的空格。