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twice consecutively: /\(\<\w\+\)\_s\+\1\> /\(\<\k\+\)\_s\+\1\> The main difference is the use of ‘\w’ and ‘\k’, where the latter is based on the ‘iskeyword’ option which may include accented and other language specific characters. For more information, read :help /\1 :help /\( :help /\) :help /\< :help /\> :help /\w :help /\k :help /\+ :help /\_x :help ‘iskeyword’ 11.10.
