fix 0 length requirements.txt issue

Author: gilesknap

.github/workflows/code.yml

@@ -98,9 +98,11 @@ jobs:
           touch requirements.txt 
           touch requirements_dev.txt
           pip install -r requirements.txt -e .
-          pip freeze --exclude-editable >> requirements.txt
+          pip freeze --exclude-editable > requirements.txt
           pip install -r requirements_dev.txt -e .[dev]
-          pip freeze --exclude-editable >> requirements_dev.txt
+          pip freeze --exclude-editable > requirements_dev.txt
+          # ensure non-zero length requirements.txt
+          echo "# runtime dependencies" >> requirements.txt
 
       - name: Install with latest dependencies
         if: ${{ ! matrix.lock }}

docs/explanations/features.rst

@@ -31,4 +31,8 @@ August 18th 2022
 - removed example code hello.py meaning that this does not 
   have to be deleted after adopting. Also removed related tests.
 - Skeleton README reduced to remove example code and to point at 
-  skeleton-cli for instructions.
+  skeleton-cli for instructions.
+- Github PR Policy set to rebase only for skeleton and any for cli. This is
+  to remove any commit hashes from commit comments. If these are present then
+  github will add incorrect comments to the target repo.
+