changed behavior of fix transition. If only one inbound connection is found to...

changed behavior of fix transition. If only one inbound connection is found to empty cell, let cell be empty and instead fix the incoming line to a dead end in seperate step
2 jobs for 188_refining_generator in 60 minutes (queued for 25 seconds)
Name Stage Failure
failed
tests Tests The script exceeded the maximum execution time set for the job
examples inst: /builds/flatland/flatland/.tox/.tmp/package/1/flatland-rl-2.0.0.zip
write config to /builds/flatland/flatland/.tox/examples/.tox-config1 as '982aa4650eaa7b66b6e95efa874ea811a98dfac3b6ebc93bf5d1259afa22cc01 /.pyenv/versions/3.6.6/bin/python3.6\n3.14.0 0 0 0\n00000000000000000000000000000000 -r/builds/flatland/flatland/requirements_dev.txt\n00000000000000000000000000000000 cairosvg\n00000000000000000000000000000000 pycairo\n00000000000000000000000000000000 tk'
[5677] /builds/flatland/flatland$ /builds/flatland/flatland/.tox/examples/bin/python -m pip install --exists-action w .tox/.tmp/package/1/flatland-rl-2.0.0.zip >.tox/examples/log/examples-4.log
[5688] /builds/flatland/flatland$ /builds/flatland/flatland/.tox/examples/bin/python -m pip freeze >.tox/examples/log/examples-5.log
examples installed: atomicwrites==1.3.0,attrs==19.1.0,cairocffi==1.1.0,CairoSVG==2.4.2,certifi==2019.9.11,cffi==1.12.3,chardet==3.0.4,Click==7.0,crowdai-api==0.1.22,cssselect2==0.2.1,cycler==0.10.0,defusedxml==0.5.0,filelock==3.0.12,flatland-rl==2.0.0,idna==2.8,importlib-metadata==0.23,importlib-resources==1.0.2,kiwisolver==1.1.0,lxml==4.4.1,matplotlib==3.1.1,more-itertools==7.2.0,msgpack==0.6.2,msgpack-numpy==0.4.4.3,numpy==1.17.2,olefile==0.46,packaging==19.2,pandas==0.25.1,Pillow==6.1.0,pluggy==0.13.0,py==1.8.0,pyarrow==0.14.1,pycairo==1.18.1,pycparser==2.19,pyparsing==2.4.2,pytest==5.1.3,pytest-runner==5.1,python-dateutil==2.8.0,python-gitlab==1.11.0,pytz==2019.2,recordtype==1.3,redis==3.3.8,requests==2.22.0,six==1.12.0,svgutils==0.3.1,timeout-decorator==0.4.1,tinycss2==1.0.2,toml==0.10.0,tox==3.14.0,urllib3==1.25.6,ushlex==0.99.1,virtualenv==16.7.5,wcwidth==0.1.7,webencodings==0.5.1,xarray==0.13.0,zipp==0.6.0
examples run-test-pre: PYTHONHASHSEED='801272517'
examples run-test: commands[0] | python /builds/flatland/flatland/benchmarks/run_all_examples.py
[5689] /builds/flatland/flatland/.tox/examples/tmp/c236d3c240d61a0969d4cb59e2180ce5$ /builds/flatland/flatland/.tox/examples/bin/python /builds/flatland/flatland/benchmarks/run_all_examples.py
ERROR: Job failed: execution took longer than 1h0m0s seconds