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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def check_git():
 """Check if git command is available."""

    try:
        with open(os.devnull, "wb") as devnull:
            subprocess.check_call(["git", "--version"], stdout=devnull, stderr=devnull)
    except:
        raise RuntimeError("Please make sure git is installed and on your path.")