Update image-file-formats.rst

Correct encoding of GIF files from run-length to LZW.
python-pillow · Apr 19, 2022 · b01a2ef · b01a2ef
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commit b01a2ef
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diff --git a/docs/handbook/image-file-formats.rst b/docs/handbook/image-file-formats.rst
@@ -101,7 +101,7 @@ GIF
 ^^^
 
 Pillow reads GIF87a and GIF89a versions of the GIF file format. The library
-writes run-length encoded files in GIF87a by default, unless GIF89a features
+writes LZW encoded files in GIF87a by default, unless GIF89a features
 are used or GIF89a is already in use.
 
 GIF files are initially read as grayscale (``L``) or palette mode (``P``)