pre-commit.yaml: add a step to install shellcheck to aid actionlint

Author: tddschn

.github/workflows/pre-commit.yaml

@@ -10,6 +10,11 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v3
+    - name: Install shellcheck
+      # used by actionlint
+      run: |
+        sudo apt-get update
+        sudo apt-get install shellcheck -y
     - name: Install actionlint
       # https://github.com/rhysd/actionlint/blob/main/docs/install.md
       run: |

.github/workflows/test.yaml

@@ -21,16 +21,19 @@ jobs:
         run: |
           python_version_abbr="${python_version//./}"
           boost_version_alias="boost_${boost_version//./_}"
+
           sudo apt-get update
           sudo apt-get install gcc -y
           sudo apt-get install g++ -y
+
           wget "https://boostorg.jfrog.io/artifactory/main/release/${boost_version}/source/${boost_version_alias}.tar.gz"
           tar -xf "${boost_version_alias}.tar.gz"
+
           cd "${boost_version_alias}"
           ./bootstrap.sh --with-python=python
           sudo ./b2 cxxflags="-fPIC" install --with-python
+
           cd ${{ github.workspace }}
-          
           sudo ln -s "/usr/local/lib/libboost_python${python_version_abbr}.a" "/usr/local/lib/libboost_python.a"
       - name: Install dependencies
         run: |