liaison

ExcerptCustomizer plugin replaces the ellipsis (…) with a 
custom text string (length less than 50, including space) 
with selected padding (To replace space). The excerpt string 
is easily broken in many themes if the excerpt string contains 
space. Not compatible with all themes.
<h3>Build Status</h3>
<h3>Development</h3>
<a href="https://github.com/liaisontw/excerptStuff" rel="nofollow ugc">ExcerptCustomizer</a>

Excerpt Customizer

ExcerptCustomizer plugin replaces the ellipsis (...) with a  custom text string with selected padding.  Not compatible with all themes.

Jonathan Desrosiers

Linchpin

Aaron Ware

Note: This plugin does not support the block editor but should continue to work without issue when using it with custom post types and the <a href="https://wordpress.org/plugins/classic-editor/" rel="ugc">Classic Editor Plugin</a>.
Before WordPress displays a post’s content, the content gets passed through multiple filters to ensure that it safely appears how you enter it within the editor.
One of these filters is <a href="https://codex.wordpress.org/Function_Reference/wpautop" title="wpautop" rel="nofollow ugc">wpautop</a>, which replaces double line breaks with <code></code> tags, and single line breaks with <code> </code> tags. However, this filter sometimes causes issues when you are inputting a lot of HTML markup in the post editor.
This plugin displays a checkbox in the publish meta box of the post edit screen that disables the <a href="https://codex.wordpress.org/Function_Reference/wpautop" title="wpautop" rel="nofollow ugc">wpautop</a> filter for that post.
Also adds a ‘wpautop’, or ‘no-wpautop’ class to the post_class filter to help with CSS styling.

Toggle wpautop

Easily disable the default wpautop filter on a post by post basis.

Excerpt Customizer vs Toggle wpautop