I am trying to pull some files and directories and I am having the following messages:

When I look in my repository I can see that the files have been downloaded but all contains _ as prefix, and even the names of files and folders contain _

requesting all changes 
adding changesets 
adding manifests 
adding file changes 
added 1094 changesets with 4304 changes to 1071 files abort:
untracked file in working directory differs from file in requested revision: '.hgignore' [command interrupted]

What is wrong?

mercurial hgignore
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