minor #19894 fix expression language precedence cell grouping (homersimpsons)

This PR was merged into the 6.4 branch.

Discussion
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fix expression language precedence cell grouping

Fix for #19860 (comment)

I do not know how to test the changes as those were working with the doc builder previously.

Commits
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46562c0 fix expression language precedence cell grouping

Author: OskarStark

reference/formats/expression_language.rst

@@ -446,9 +446,9 @@ Operators                                                associativity
 ``~``                                                    left
 ``+``, ``-``                                             left
 ``..``                                                   left
-``==``, ``===``, ``!=``, ``!==``,                        left
-``<``, ``>``, ``>=``, ``<=``,
-``not in``, ``in``, ``contains``,
+``==``, ``===``, ``!=``, ``!==``, \                      left
+``<``, ``>``, ``>=``, ``<=``, \
+``not in``, ``in``, ``contains``, \
 ``starts with``, ``ends with``, ``matches``
 ``&``                                                    left
 ``^``                                                    left