End-of-line comments are prompted with "is not a valid attribute name"

I use end-of-line comments in my .gitattributes file, and it is often (not always present, but often) prompted with '# is not a valid attribute name: .gitattributes:1' when performing many operations.

This is my .gitattributes: ``` res/csv/*.txt eol=lf # 保证csv为lf，以匹配解析格式

# Custom for Visual Studio *.cs diff=csharp ```

When performing certain operations: ···shell

# is not a valid attribute name: .gitattributes:1 On branch master Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean ···

Other repositories that have .gitattributes files and include end-of-line comments do the same thing. I'm sure there are no special characters in my files.