某些歌词来源（如网易云）存在较多空行，即一行歌词结束后，它的下一行是空行。这样桌面歌词出现/消失过于频繁。
我想利用过滤功能忽略空白行（例如正则表达式/^\s*）但是对于无任何字符的空行不起作用。

Some lyric sources (e.g. 163) contains too many empty lines (after a line of lyrics ends, its next line is empty). This leads to Desktop lyrics appearing/disappearing too often.
I would like to use the filter to ignore blank lines (e.g. using regular expression /^\s*) but it doesn't work for blank lines which have no characters.