Hyphens not generated for split-words in a "note" directive

[rhettinger]

BPO	39814
Nosy	@rhettinger, @zware, @idomic

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-03-01.18:31:42.814>
labels = ['type-bug', 'docs']
title = 'Hyphens not generated for split-words in a "note" directive'
updated_at = <Date 2020-03-02.06:18:27.912>
user = 'https://github.com/rhettinger'

bugs.python.org fields:

activity = <Date 2020-03-02.06:18:27.912>
actor = 'zach.ware'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2020-03-01.18:31:42.814>
creator = 'rhettinger'
dependencies = []
files = []
hgrepos = []
issue_num = 39814
keywords = []
message_count = 3.0
messages = ['363075', '363082', '363125']
nosy_count = 4.0
nosy_names = ['rhettinger', 'docs@python', 'zach.ware', 'Ido Michael']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue39814'
versions = []

[rhettinger]

The justification algorithm for the docs will sometimes split words at the end of a line and will add a hyphen to indicate the continuation. This works in most text but is broken within a "note" directive.

For example, there dangling "im" split of "implemenation" at the end of the third line in the note at:
https://docs.python.org/3/library/functools.html#functools.total_ordering

Contrast this with the correct "sup-" split of "supplies" in the first sentence.

[idomic]

Looks like a bug in the dev repo? What's the class responsible for rendering the notes?

I can take this

[zware]

Is this not a Sphinx issue?

[slateny]

Is this still true? I've tried changing the width of a window and it doesn't try splitting words, instead it just sends it to a new line

[AA-Turner]

I can't reproduce this; closing. Note we now set hyphens: auto; in Sphinx's basic.css.

A