Problems with news in ‘NEWS.md’:
  Cannot extract version info from the following section titles:
    Major changes
    Bug fixes
Problems with news in ‘NEWS.md’:
  Cannot extract version info from the following section titles:
    Major changes
    Bug fixes
Problems with news in ‘NEWS.md’:
  Cannot extract version info from the following section titles:
    Major changes
    Bug fixes
Namespace in Imports field not imported from: ‘knitr’
  All declared Imports should be used.
Problems with news in ‘NEWS.md’:
  Cannot extract version info from the following section titles:
    Major changes
    Bug fixes
Namespace in Imports field not imported from: ‘knitr’
  All declared Imports should be used.
Problems with news in ‘NEWS.md’:
  Cannot extract version info from the following section titles:
    Major changes
    Bug fixes
Namespace in Imports field not imported from: ‘knitr’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘knitr’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘knitr’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘knitr’
  All declared Imports should be used.