gvimdiff can not hightlight correctly the difference in a line

Suppose that I have the following two lines in two files (each in one
file), gvimdiff highlight everything after '=' without knowing that
'sdsafdasfa' is the same in both lines. Is there a way to make
gvimdiff be aware of the commonality flanked by two mismatches?

i =x.y 19 sdsafdasfa xx
i = 19 sdsafdasfa

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