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-rw-r--r--doc/source/index.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/source/index.rst b/doc/source/index.rst
index c693ff0..c880c2e 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -2215,6 +2215,11 @@ or on any of its ``Tag`` objects::
# </i>
# </a>
+Since it adds whitespace (in the form of newlines), ``prettify()``
+changes the meaning of an HTML document and should not be used to
+reformat one. The goal of ``prettify()`` is to help you visually
+understand the structure of the documents you work with.
+
Non-pretty printing
-------------------