Add links to bob.blitz.extension classes at documentation (see bob/bob.extensionssh beatubu1404)

12 jobs for improved_docs in 8 minutes and 47 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Build
passed #20926
conda-linux
build_linux_27

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conda-linux
build_linux_34

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conda-linux
build_linux_35

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conda-macosx
build_macosx_27

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passed #20929
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build_macosx_34

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passed #20927
conda-macosx
build_macosx_35

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  Test
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conda-linux
test_linux_27

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96.0%
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test_linux_34

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conda-linux
test_linux_35

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96.0%
passed #20933
conda-macosx
test_macosx_27

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96.0%
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conda-macosx
test_macosx_34

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96.0%
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conda-macosx
test_macosx_35

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96.0%