[mod] Revert changes made for Poetry 1.0.0b3 now fixed in b4:

- 'poetry run' no longer needs `--`.

Revert "[fix] Call 'poetry run silkaj' tests with '--'"
Revert "[fix] 'poetry run' cli parsing changed in 1.0.0b3:"

This reverts commit f335a2bd.
This reverts commit 4f772671.

.gitlab-ci.yml

@@ -63,8 +63,8 @@ tests-3.7-coverage:
   tags: [poetry-78]
   script:
     - poetry install
-    - poetry run -- pytest --cov silkaj --cov-report html:cov_html
-    - poetry run -- coverage-badge -o cov_html/coverage.svg
+    - poetry run pytest --cov silkaj --cov-report html:cov_html
+    - poetry run coverage-badge -o cov_html/coverage.svg
   artifacts:
     paths:
       - cov_html

doc/install_poetry.md

@@ -37,5 +37,5 @@ You might need to enter Poetry shell to access development tools such as `pytest
 
 Add following alias to your shell configuration:
 ```bash
-alias silkaj="cd /path/to/silkaj/silkaj && poetry run -- silkaj"
+alias silkaj="cd /path/to/silkaj/silkaj && poetry run silkaj"
 ```

tests/test_end_to_end.py

 from subprocess import check_output
 
-silkaj = ["poetry", "run", "--", "bin/silkaj"]
+silkaj = ["poetry", "run", "bin/silkaj"]
 
 
 def test_info():