Public bug reported:

* What you're doing and what's happening:  launching bash from a user
whose name includes a space breaks /etc/profile.d/wsl-integration.sh

* What's wrong / what should be happening instead:

> PS C:\Users\Jack Troughton\git\dcp-jason> bash
> -bash: [: /mnt/c/Users/Jack: binary operator expected
> mkdir: cannot create directory ë/mnt/c/Users/Jackí: Permission denied
> -bash: $WSL_INTEGRATION_CACHE: ambiguous redirect
> 
> 

The reason it breaks is due to incorrect quoting around $HOME and things
derived from it.  It looks like you have parallel issues as well which
could break pulse audio on a machine with a space in its hostname (is
that legal in windows-land?)

I have created a zip file containing a fix, both the complete script and
a unified context diff.  I hereby place my changes in the public domain,
free for use by anybody for anything.

The fix is at http://people.kingsds.network/wesgarland/wsl-integration-
fix.zip

Windows build number: Microsoft Windows [Version 10.0.18362.720]

My WSL is the Ubuntu flavour of 
Linux version 4.4.0-18362-Microsoft (micros...@microsoft.com) (gcc version 
5.4.0 (GCC) ) #476-Microsoft Fri Nov 01 16:53:00 PST 2019

lsb_release -rd says
Description:    Ubuntu 18.04.4 LTS
Release:        18.04

apt-cache policy wslu says
wslu:
  Installed: (none)
  Candidate: 2.3.2-0ubuntu2~18.04.3
  Version table:
     2.3.2-0ubuntu2~18.04.3 500
        500 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
        500 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main i386 
Packages

** Affects: wslu (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1869878

Title:
  Space in username breaks wsl integration cache

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