On this edit
https://pt.wikibooks.org/wiki/Matem%C3%A1tica_elementar/Trigonometria/Arcos_e_%C3%A2ngulos?diff=270018
VisualEditor replaced the good namespace "Imagem" by "Ficheiro", which is worse.
The word "Ficheiro" is not appropriated here:
* It is not used in the pt-BR variant, so per discussion in the community it should be avoided whenever it is possible[1][2]. And it is always possible to be avoid this word if the file is an image (because "Imagem" is a common word in pt-BR and pt-PT);
* It replaced a precise description of the file by a generic one. There is nothing wrong in saying that "Foo.PNG" is a image.
[1] https://pt.wikipedia.org/wiki/WP:Esplanada/propostas/Incentivar_o_uso_de_%22Imagem%22_em_vez_de_%22Arquivo%22_ou_%22Ficheiro%22_(12mar2011)
[2] http://sourceforge.net/p/pywikipediabot/bugs/1323/
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**Severity**: normal