While trying to autocomplete a file (e.g. to open a file with C-x C-f) Emacs-helm shows a list of possible candidates.
If I then press Tab (which I would hope it would help me choose the first/closest match), I get the following in the minibuffer:
看起来迷你缓冲区与转义字符混淆了，并且它没有选择我真正想要打开的文件（首选）。
Helm 需要从默认的 Emacs 完成中进行概念跳转，这不是那么明显：
您无需按键即可完成。完成缓冲区刷新 每次输入后都会有新的结果。
这称为“增量”完成。
The normal tab functionality is not needed in "incremental"
completion. So tab was rebound to helm-select-action, which allows you to
choose an alternative action with the selection. But there is only one action
in read-file-name.
不过，您看到的错误可能会更清楚，我已经提交了这个issue https://github.com/emacs-helm/helm/issues/117在 github 上。
Additionally, note Helm treats each space separated term as a filtering regular expression. So, pressing space foo will filter the current list down to those that contain foo in the name.
