clip: |
  This is a single clipped line
keep: |+
  This is a single kept line
strip: |-
  This is a single stripped line
clip2: |
  These are two
  clipped lines
keep2: |+
  These are two
  kept lines
strip2: |-
  These are two
  striped lines
clip3: |
  These are two
  clipped lines with trailing line breaks



keep3: |+
  These are two
  kept lines with trailing line breaks



strip3: |-
  These are two
  striped lines with trailing line breaks