.gitignore路径匹配语法中的前导星号“ ** /”是否多余？

有没有用星号不能替代的用法？

Two consecutive asterisks ("**") in patterns matched against full
pathname may have special meaning:

A leading "**" followed by a slash means match in all directories.
For example, "**/foo" matches file or directory "foo" anywhere,
the same as pattern "foo". "**/foo/bar" matches file or directory
"bar" anywhere that is directly under directory "foo".

A trailing "/**" matches everything inside. For example, "abc/**"
matches all files inside directory "abc", relative to the location
of the .gitignore file, with infinite depth.

A slash followed by two consecutive asterisks then a slash matches
zero or more directories. For example, "a/**/b" matches "a/b",
"a/x/b", "a/x/y/b" and so on.

Other consecutive asterisks are considered invalid.

https://git-scm.com/docs/gitignore#_pattern_format

让我指出，我只问有关前导星号/斜杠冗余的问题。由于似乎**/foo/bar可以用简单的方法代替foo/bar

例如，我的.gitignore文件中包含以下内容：

Two consecutive asterisks ("**") in patterns matched against full
pathname may have special meaning:

A leading "**" followed by a slash means match in all directories.
For example, "**/foo" matches file or directory "foo" anywhere,
the same as pattern "foo". "**/foo/bar" matches file or directory
"bar" anywhere that is directly under directory "foo".

A trailing "/**" matches everything inside. For example, "abc/**"
matches all files inside directory "abc", relative to the location
of the .gitignore file, with infinite depth.

A slash followed by two consecutive asterisks then a slash matches
zero or more directories. For example, "a/**/b" matches "a/b",
"a/x/b", "a/x/y/b" and so on.

Other consecutive asterisks are considered invalid.

我想知道为什么他们不能简单地写：

# NuGet Packages

# The packages folder can be ignored because of Package Restore
**/packages/*

# except build/, which is used as an MSBuild target.
!**/packages/build/

# Uncomment if necessary however generally it will be regenerated when needed
#!**/packages/repositories.config

If the pattern does not contain a slash /, Git treats it as a shell glob
pattern and checks for a match against the pathname relative to the
location of the .gitignore file (relative to the toplevel of the work
tree if not from a .gitignore file).