我的.gitignore文件似乎被 Git 忽略了 -.gitignore文件可能已损坏吗？Git 期望哪种文件格式、语言环境或文化？

我的.gitignore：

# This is a comment
debug.log
nbproject/

输出git status：

# On branch master
# Your branch is ahead of 'origin/master' by 1 commit.
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#       debug.log
#       nbproject/
nothing added to commit but untracked files present (use "git add" to track)

我希望debug.log并且nbproject/不要出现在未跟踪的文件列表中。

我应该从哪里着手解决这个问题？