Line comments are printed mid-line

[dave]

Thanks to @magicsong for reporting this in #49:

Values(DictFunc) cannot add comment of each field like following:

opt := &LoginOption {
Login : "MUST_EDIT_IT", // [TODO] This field is REQUIRED
Password : "MUST_EDIT_IT", // [TODO] This field is REQUIRED
}

Line comments are inserted in the output where the Comment function is executed. Perhaps there should be a buffer of line comments that only gets written when we get to a \n?