WordPress Remove Auto Line Breaks From Content and Excerpt
Introduction
For sites that rely on HTML by hand in the editor or excerpts, ones you want to code yourself, the auto line breaks can be an annoyance. You can disable them by removing these filters.
Remarks
These must be executed directly in an include file. Whether it is in functions.php or in another include file, these cannot be wrapped in a hook. They won't work on init or any other I have found so far.
They can also be included directly in a template like page.php to execute only for that template.
NOTE: DO NOT INCLUDE THIS IN A DISTRIBUTED THEME OR PLUGIN (unless it is disabled by default, like not including the include file it's in unless the user specifies).
This is bad practice to include in a site you don't control because it can and will break the output of any other themes or plugins.
