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+tikz-bbox
+=========
+
+Copyright 2021 by marmotghost.
+v0.1
+
+This file may be distributed and/or modified under the
+LaTeX project public license (LPPL), version 1.3c
+see
+https://www.latex-project.org/lppl/lppl-1-3c/
+
+
+The built-in determination of the bounding box in TikZ is not entirely accurate.
+This is because, for Bezier curves, it is the smallest box that contains all
+control points, which is in general larger than the box that just contains the
+curve. This library determines the exact bounding box of the curve.
+
+In order to load this library in a LaTeX document, you need to add
+
+\usetikzlibrary{bbox}
+
+to the preamble after loading the tikz package. While this library might
+possibly work with TeX or ConTeXt, this has never been tested. This library
+loads and uses the fpu library.