Regex Tester & Validator

This regular expression matches text enclosed in double tildes (`~~`), effectively capturing the full block including the tildes. Inside the delimiters, it expects characters that are not tildes, allowing it to isolate content like Markdown strikethrough formatting. It is important to note that due to how the capturing group is structured, the nested capturing group will only store the very last character before the closing tildes. It is typically used to find all occurrences of such patterns within a larger body of text.