Integrated Console doesn't display >> prompt

[benpiper]

System Details

code -v
1.15.0
8b95971d8cccd3afd86b35d4a0e098c189294ff2
$pseditor.EditorServicesVersion

Major  Minor  Build  Revision
-----  -----  -----  --------
1      4      1      0
code --list-extensions --show-versions
Borke.puppet@0.3.2
henriiik.docker-linter@0.3.0
Kasik96.format-indent@1.2.3
ms-vscode.PowerShell@1.4.1
$PSVersionTable

Name                           Value
----                           -----
PSVersion                      5.1.14409.1012
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.14409.1012
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Issue Description

Behavior of PowerShell Integrated Console:

PS C:\> function test {
Missing closing '}' in statement block or type definition.
At line:0 char:0

Expected behavior:

PS C:\> function test {
>> Write-Host "This works"
>> }
>>
PS C:\>

[daviwil]

This is being tracked by #569, closing in favor of that. Thanks!