git fails with control characters in trunk directory name

Using the mouse to paste a git url from a website into a terminal session in order to clone the repository, I recently managed to include invisible control characters into the git trunk directory name.

Consequently, I faced all sort of strange behaviour like git pull not working (error 2), later on a kernel make which supposedly could not finding a rule to create the trunk directory and more such inconsistencies. I then reinstalled git, rcs and so on and also tried unsuccessfully several git versions. The next morning I looked into the .git/config file and recognized that the "url" key value within the [remote "origin"] section contained some control characters: ^J and \n, as fas as I remember.

While this was almost entirely my fault, git could possibly apply a filter, reject such a name or at least issue a warning.