Merge branch 'bb/doc-eol-dirty' into maint

Doc update.

* bb/doc-eol-dirty:
  Documentation: mention that `eol` can change the dirty status of paths

Documentation/gitattributes.txt

@@ -151,7 +151,10 @@ unspecified.
 
 This attribute sets a specific line-ending style to be used in the
 working directory.  It enables end-of-line conversion without any
-content checks, effectively setting the `text` attribute.
+content checks, effectively setting the `text` attribute.  Note that
+setting this attribute on paths which are in the index with CRLF line
+endings may make the paths to be considered dirty.  Adding the path to
+the index again will normalize the line endings in the index.
 
 Set to string value "crlf"::