Bug summary

Starting with 3.5.0, figures exported as SVG without font embedded in the file (i.e. “svg.fonttype” set to “none”) use thefont CSS shorthand property.
The problem is that the font-family generic name is quoted and some viewers don’t like it (chrome for exemple). My understanding (readinghttps://developer.mozilla.org/en-US/docs/Web/CSS/font-family) is that only the family name should be quoted if it contains spaces.

Code for reproduction

importmatplotlibimportmatplotlib.pyplotmatplotlib.rcParams["svg.fonttype"]="none"matplotlib.rcParams["font.family"]="sans-serif"matplotlib.use("SVG")fig=matplotlib.pyplot.figure()axes=fig.add_subplot()axes.plot([1,2], [3,4],label="test")axes.legend()fig.savefig(f"test.svg")

Actual outcome

In the text elements, the generic name of the font-family is quoted (here 'sans-serif')
<text x="94.6" y="57.629812" transform="rotate(-0, 94.6, 57.629812)">test</text>

Expected outcome

The generic name of the font-family should not be quoted
<text x="94.6" y="57.629812" transform="rotate(-0, 94.6, 57.629812)">test</text>

Additional information

No response

Operating system

No response

Matplotlib Version

3.5.1

Matplotlib Backend

SVG

Python version

3.9.10

Jupyter version

No response

Installation

conda