autoload/netrw.vim contains a typo on NetrwBrowseUpDir mapping

[Romain TOUZE]

Hello,

File /usr/share/vim/vim81/autoload/netrw.vim contains a typo on NetrwBrowseUpDir. It should be

```
if !hasmapto('<Plug>NetrwBrowseUpDir') |nmap <buffer> <silent> <nowait> - <Plug>NetrwBrowseUpDir|endif
``` (without space)

This minor but very annoying :-)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: vim 2:8.1.2269-1ubuntu5.4
ProcVersionSignature: Ubuntu 5.4.0-90.101-generic 5.4.148
Uname: Linux 5.4.0-90-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 17 09:44:27 2021
InstallationDate: Installed on 2020-01-07 (679 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/usr/bin/zsh
SourcePackage: vim
UpgradeStatus: Upgraded to focal on 2021-08-16 (92 days ago)

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "netrw.diff" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Brian Murray (brian-murray)]

This is not the case with the version of vim (2:8.2.2434-3ubuntu3.1) which is included with Ubuntu 21.10 so I'm setting this task to Fix Released but opening one for Focal.