venv: bin/activate.fish doesn't work

[roland]

Creating a virtual env with pyvenv and activating it using the fish shell will throw an error.
This is due to a '$' being added to the venv prompt.
This is behavior that is not in python 3.5: https://hg.python.org/cpython/file/3.5/Lib/venv/

/tmp> pyvenv venv
/tmp> source venv/bin/activate.fish
The “$” character begins a variable name. The character “(”, which directly followed a “$”, is not allowed as a part of a variable name, and variable names may not be zero characters long. To learn more about variable expansion in fish, type “help expand-variable”.
venv/bin/activate.fish (line 58): if test -n "$(venv) "
                                                     ^
from sourcing file venv/bin/activate.fish
 called on standard input

source: Error while reading file “venv/bin/activate.fish”

Ubuntu 16.04.1 LTS
pyvenvv-3.5

[roland (roland-micite)]

I have this bug with 3.5.

[roland (roland-micite)]

I only affect me on Ubuntu 16.04, not on 16.10.