xml-escape:tldr:2d94b
The command you provided is an XML escape command for the text "${
In this specific command, the text "${
By applying the XML escape command, these special characters will be replaced with their respective entity format, which is typically done by adding a special character reference. For example, the "<" character will be replaced with "<", and the ">" character will be replaced with ">".
So, after escaping, the resulting text will be something like "${<a1>}", where "$" represents the special character "$", "{" represents "{", "}" represents "}", "<" represents "<", and ">" represents ">".
The purpose of XML escaping is to ensure that the XML document remains valid and properly interprets the special characters within the text without confusing them with the XML syntax.