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Fix error in latex (pgf) generation of Graphics objects due to spec changes upstream (matplotlib) #41262

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Fix error in latex (pgf) generation of Graphics objects due to spec changes upstream (matplotlib) #41262

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7 changes: 4 additions & 3 deletions src/sage/plot/graphics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3381,11 +3381,12 @@ def save(self, filename, **kwds):
if latex_implementations[0] == "pdflatex":
# use pdflatex and set font encoding as per
# matplotlib documentation:
# https://matplotlib.org/users/pgf.html#pgf-tutorial
# https://matplotlib.org/stable/users/explain/text/pgf.html
# Note that pgf.preamble should be a string now, not a list
pgf_options = {"pgf.texsystem": "pdflatex",
"pgf.preamble": [
"pgf.preamble": "\n".join([
r"\usepackage[utf8x]{inputenc}",
r"\usepackage[T1]{fontenc}"]}
r"\usepackage[T1]{fontenc}"])}
else:
pgf_options = {
"pgf.texsystem": latex_implementations[0],
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