title: Github actions issue - Error: Process completed with exit code 2
body: <p>I have following piece of code for github actions:</p>
  <pre><code>name: Python application
  
  on:
    push:
      branches: [ main ]
  
  jobs: 
    build: 
    
      runs-on: ubuntu-latest
      
      steps: 
      - uses: actions/checkout@v2
      - name: Install dependencies 
        run: /
          python -m pip install --upgrade pip
          python -m pip install numpy pytest
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
      - name: Test Selenium
        run: /
          python -m pytest -v -m devs
  </code></pre>
  <p>But when I commit, and actions start running, I get this error:</p>
  <pre><code>Run / python -m pip install --upgrade pip python -m pip install numpy pytest if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
    / python -m pip install --upgrade pip python -m pip install numpy pytest if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
    shell: /usr/bin/bash -e {0}
  /home/runner/work/_temp/317511f5-0874-43d8-a0ae-2601804ff811.sh: line 1: syntax error near unexpected token `then'
  Error: Process completed with exit code 2.   
  </code></pre>
  <p>And this is just under my Install dependencies. Am I missing something super obvious? Thank you in advance for the help.</p>