Issue when running prompt

**Description of the issue**

I followed all of the instructions, but when I try to set the environment variable prompt, I get this error:

```
At line:1 char:5
+ $E[1;32;40m→ $E[1;36;40m$p$E[1;35;40m› $E[1;37;40m
+ ~
Missing ']' after array index expression.
At line:1 char:18
+ $E[1;32;40m→ $E[1;36;40m$p$E[1;35;40m› $E[1;37;40m
+ ~
Missing ']' after array index expression.
At line:1 char:44
+ $E[1;32;40m→ $E[1;36;40m$p$E[1;35;40m› $E[1;37;40m
+ ~
Missing ']' after array index expression.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : MissingEndSquareBracket
```

**Screenshots**

**Version Information**

> Please provide the output of this PowerShell command: `(Get-Module PSReadline).Version; (Get-Module posh-git).Version`

```
Major Minor Build Revision
----- ----- ----- --------
2 0 0 -1
```