没有了编码检测设置，在比较文件时常会遇到 "无法提取文件 文件不是使用 ['utf8'] 进行编码的" 或者 "Could not read file, file is not in encodings: ['utf8']"。
参考这里：Meld 3.11.0 and encoding
in meld 1.8.4 I had the option "Encoding". Here I used "utf8 latin1".
In meld 3.11.0 there is no "Encoding" options. It seems to use only utf8.
By comparing some of my files I get the error message:"Could not read file"
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There is no UI for it. You can set the encodings that will be tried in
Meld's 'detect-encodings' gsettings key.
按网上的回答就是：界面设置编码的地方没有了，配置里面仍然有效。
解决办法：
1、 用命令查看当前设置的编码
gsettings get org.gnome.meld detect-encodings
2、 用命令设置支持哪些字符集编码检测
解决办法：
1、 用命令查看当前设置的编码
gsettings get org.gnome.meld detect-encodings
2、 用命令设置支持哪些字符集编码检测
gsettings set org.gnome.meld detect-encodings "['utf8','cp936','latin1']"
