ENH: Remove the extra line breaks and improve the formating of the the release notes. Also, modify the workflow for manual triggering. [skip ci]

Author: cheginit

.github/workflows/release.yml

@@ -1,9 +1,10 @@
+name: Publish
+
 on:
   push:
     tags:
       - 'v*'
-
-name: Publish
+  workflow_dispatch: # allows you to trigger manually
 
 jobs:
   changelog:
@@ -13,7 +14,8 @@ jobs:
       - uses: actions/checkout@v2.3.4
       - name: Generate Changelog
         run: |-
-          echo "**Release Notes**" > ${{ github.workflow }}-CHANGELOG.rst
+          echo "Release Notes" > ${{ github.workflow }}-CHANGELOG.rst
+          echo "-------------" >> ${{ github.workflow }}-CHANGELOG.rst
           PAT="^---"
           L1=$(grep -n $PAT HISTORY.rst | sed -n 1p | cut -d ":" -f 1)
           L2=$(grep -n $PAT HISTORY.rst | sed -n 2p | cut -d ":" -f 1)
@@ -23,11 +25,12 @@ jobs:
         with:
           args: >-
               ${{ github.workflow }}-CHANGELOG.rst
+              --wrap=none
               -t markdown
               -o ${{ github.workflow }}-CHANGELOG.md
-      - name: Remove extra newlines
+      - name: Remove extra spaces
         run: |-
-            sed -i -e :a -e '$!N;s/\n    / /;ta' ${{ github.workflow }}-CHANGELOG.md
+            sed -i 's/-   /- /g' ${{ github.workflow }}-CHANGELOG.md
       - name: Github Release
         uses: softprops/action-gh-release@v1
         if: startsWith(github.ref, 'refs/tags/')