Isaac Schwabacher added the comment:
This may be only syntactic sugar, but it is POSIX-specified syntactic sugar:
according to http://pubs.opengroup.org/onlinepubs/9699919799/. trailing slashes
in pathnames are semantically meaningful in pathname resolution. Tilde escapes
are not mentioned.
4.12 Pathname Resolution
========================
[...]
A pathname that contains at least one non- <slash> character and that ends with
one or more trailing <slash> characters shall not be resolved successfully
unless the last pathname component before the trailing <slash> characters names
an existing directory or a directory entry that is to be created for a
directory immediately after the pathname is resolved. Interfaces using pathname
resolution may specify additional constraints[1] when a pathname that does not
name an existing directory contains at least one non- <slash> character and
contains one or more trailing <slash> characters.
If a symbolic link is encountered during pathname resolution, the behavior
shall depend on whether the pathname component is at the end of the pathname
and on the function being performed. If all of the following are true, then
pathname resolution is complete:
1. This is the last pathname component of the pathname.
2. The pathname has no trailing <slash>.
3. The function is required to act on the symbolic link itself, or certain
arguments direct that the function act on the symbolic link itself.
In all other cases, the system shall prefix the remaining pathname, if any,
with the contents of the symbolic link. [...]
----------
nosy: +ischwabacher
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<http://bugs.python.org/issue21039>
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