Add a GitHub Action to run pytest

Author: cclauss

.github/workflows/ci.yml

@@ -0,0 +1,8 @@
+name: ci
+on: [pull_request, push]
+jobs:
+  pytest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - run: pipx run pytest --doctest-modules

flowsignal.py

@@ -21,12 +21,14 @@
 return address need to be added to the return stack.
 
 >>> flowsignal = FlowSignal(ftype=FlowSignal.RETURN)
->>> print(flowsignal.ftarget)
--1
+>>> flowsignal.ftarget is None
+True
+>>> flowsignal.ftype
+5
 >>> flowsignal = FlowSignal(ftarget=100, ftype=FlowSignal.SIMPLE_JUMP)
->>> print(flowsignal.ftarget)
+>>> flowsignal.ftarget
 100
->>> print(flowsignal.ftype)
+>>> flowsignal.ftype
 0
 """