enivid

When you publish a post or update an already published post, this plugin will format the post’s content to certain typographic rules:
<ol>
<li>
All hyphens between two words (surrounded by spaces) will be transformed to m-dashes with the non-breaking spaces ahead of them.
</li>
<li>
All hyphens between digits (without spaces) will be transformed to n-dashes. But it tries to preserve phone numbers.
</li>
<li>
All spaces following these words will be replaced with the non-breaking spaces:
<ul>
<li>at</li>
<li>or </li>
<li>and</li>
<li>the</li>
<li>a</li>
<li>an</li>
<li>in</li>
<li>on</li>
<li>of</li>
<li>for</li>
<li>to</li>
<li>as</li>
<li>i</li>
<li>or</li>
<li>my</li>
</ul>
</li>
<li>
Double and more spaces are replaced with the single ones.
</li>
<li>
All misplaced spaces near dots, colons, semicolons, exclamation marks and question marks are fixed, where possible.
</li>
<li>
Composed words with hyphens in them (e.g. easy-to-use) will be wrapped in <code></code> tags.
</li>
<li>
<code><pre></pre></code> tag and its contents are preserved.
</li>
</ol>
<h4>Problems:</h4>
<ol>
<li>
The plugin will not mess with the HTML tags or other mark-up tags delimited with < and >. It will mess with the Javascript code and such constructions as:
<pre><code> [code]
 bla bla bla
 [/code]
</code></pre>
Though, since version 6, the mess is minimized for [code] and [video] tags.
</li>
<li>
The n-dash thing will mess up with the phone numbers that have only one hyphen in them. They will be confused with the value ranges.
</li>
</ol>
<h3>Thanks to</h3>
<a href="https://www.artlebedev.ru/typograf/" rel="nofollow ugc">Typograf by Artemy Lebedev</a>

Post Typographer

Adds non-breaking spaces, `` tags, common spaces, tags and dashes where needed. Works with English texts only.

Damian Góra

Support typographic rules in Polish and Czech 
Moves conjunctions, prepositions, etc. to the new line. ( sierotki )
Support punctuation marks in French 
Adds a non-breaking space <code>&nbsp;</code> before punctuation marks as <code>!</code> <code>?</code> <code>;</code> <code>%</code> <code>«</code> <code>»</code>
How it works? 
The plugin automatically adds HTML entity <code>&nbsp;</code> ( non-breaking space ) after selected words or phrases. E.g. ‘Mr. Someone’ should be ‘Mr.<code>&nbsp;</code>Someone’. Works with:
<ul>
<li>posts</li>
<li>titles</li>
<li>pages</li>
<li>custom post types</li>
<li>comments</li>
<li>widgets</li>
<li>custom contents</li>
</ul>
You can create your own list of words/phrases or import our proposals.
Custom contents 
You can use the function <code><?php auto_nbsp($content, $echo); ?></code> to add <code>&nbsp;</code> to the custom content. Use this in your code. 
1. Param <code>$content</code> – (string) (required) Free text 
2. Param <code>$echo</code> – (bool) (optional) true (echo), false (return), Default: true
Other features: 
* Advanced Custom Fields compatibility
If you have any ideas for how Automatic NBSP could be improved, you write to us.

Automatic NBSP

Automatically adds a non-breaking space (&nbsp) in the content.

Post Typographer vs Automatic NBSP