Prevent permalink icon from wrapping alone

[n-peugnet]

.fa styles sets display to inline-block. We force the .headerlink elements to stay inline, to make it wrap together with the previous word.

This should fix: #1412
But I will wait @benjaoming to push the built assets to see the result.

[benjaoming]

Tested a build with the same documentation that had the issue ✔️

Before

After

[benjaoming]

@agjohnson any worries about this one?

From a test, this works. The placement of the pilcrow seems unchanged

I also just discovered that it's not a pilcrow in later versions of Sphinx.

[n-peugnet]

I also just discovered that it's not a pilcrow in later versions of Sphinx.

I think the link icon comes from the RTD theme:

sphinx_rtd_theme/sphinx_rtd_theme/__init__.py

Lines 72 to 76 in 6444ca8

	# sphinx emits the permalink icon for headers, so choose one more in keeping with our theme
	if sphinx_version >= (3, 5, 0):
	app.config.html_permalinks_icon = "\uf0c1"
	else:
	app.config.html_add_permalinks = "\uf0c1"

The strange part for me is: in which conditions do you have the pilcrow with Sphinx RTD theme?

[benjaoming]

The strange part for me is: in which conditions do you have the pilcrow with Sphinx RTD theme?

LOL, I honestly didn't consider this the reason. So I'm actually seeing the new icon after we started building with a fix in readthedocs/readthedocs.org#9654 -- long story short, then the setup(app) signal has been skipped in certain scenarios on Read the Docs itself.