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+# Package `atendofenv`
+
+A LaTeX package to allow adding a custom symbol at the end of an environment
+(e.g. theorems, definitions, remarks)
+
+## Usage
+
+To add a small triangle at the end of a theorem, simply insert this after
+declaring the `theorem` environment with `\newtheorem`.
+
+```tex
+  \AtEndOfEnv{theorem}{$\triangleleft$}
+```
+
+## Dependencies
+- amsthm (for the QED stack)
+- letltxmacro (for saving existing macros)
+
+
+## Maintainer
+Fangyi Zhou <me+ctan@fangyi.io>
+
+## Licence
+The Unlicense