Marks some doctstrings as raw, to silence a SyntaxWarning about invalid escape sequences.

[mr-c]

Summary of changes

This was reported by a Debian user: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1067726

Before

$ python -c 'import rdflib.extras.external_graph_libs'
rdflib/extras/external_graph_libs.py:79: SyntaxWarning: invalid escape sequence '\*'
  """Converts the given graph into a networkx.MultiDiGraph.
rdflib/extras/external_graph_libs.py:136: SyntaxWarning: invalid escape sequence '\*'
  """Converts the given graph into a networkx.DiGraph.
rdflib/extras/external_graph_libs.py:199: SyntaxWarning: invalid escape sequence '\*'
  """Converts the given graph into a networkx.Graph.
$

After:

$ python -c 'import rdflib.extras.external_graph_libs'
$

Checklist

• Checked that there aren't other open pull requests for
  the same change.
• Checked that all tests and type checking passes.
• Considered granting push permissions to the PR branch,
  so maintainers can fix minor issues and keep your PR up to date.

[coveralls]

coverage: 91.039% (+0.009%) from 91.03%
when pulling d67308a on mr-c:fix_SyntaxWarning
into 959dec5 on RDFLib:main.

[coveralls]

coverage: 90.618% (-0.009%) from 90.627%
when pulling 8990bb6 on mr-c:fix_SyntaxWarning
into 5c6d942 on RDFLib:main.

[nicholascar]

@mr-c is this PR still needed now? There have been a number of updates to the various syntax checkers in use recently.

Could you please confirm this is still relevant on Debian and, if so, I will merge.

The Debian bug report seems to indicate this is fixed in RDFLib 7.0.0

[mr-c]

@mr-c is this PR still needed now? There have been a number of updates to the various syntax checkers in use recently.

Hello, I'm on vacation and away from any computer. Can you run the following on the tip of the development branch? If any warnings print then yes, this PR is still needed.

python -c 'import rdflib.extras.external_graph_libs'

[mr-c]

The Debian bug report seems to indicate this is fixed in RDFLib 7.0.0

It is fixed in the Debian package of rdflib starting with version 6.3.2-1 (the -1 suffix is the version of the Debian package) because we added this patch ☺️ which we still used for rdflib 7.0.0

https://salsa.debian.org/python-team/packages/rdflib/-/blob/debian/debian/patches/silence_SyntaxWarnings.patch?ref_type=heads

A.k.a.
https://sources.debian.org/src/rdflib/7.0.0-1/debian/patches/silence_SyntaxWarnings.patch/

[ashleysommer]

@nicholascar This isn't related to linting, the warning is emitted when Python is configured to print SyntaxWarnings on import of packages. Its technically a bug in the docstrings on the RDFLib external_graph_libs module. Our linters and tests don't pick it up because they have a #noqa: comment on them to silence the linters.

@mr-c This is a nice simple patch, I'll merge it.