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I installed the eclipse on my Windows computer and downloaded my project to continue the same, I had not noticed before, but on the screen that work, when I came across an error I realized that the characters were like this:
@Size(max = 20, message = "Máximo de 20 caracteres permitidos.")
Being that in the notebook is not and nor in the github. This happened on my computer, does anyone know if this is the eclipse so that I can correct?

Check the file entry. It is possible that it has changed.alters to utf-8
– Israel Zebulon