Remove   from the_excerpt
Вопрос
Wordpress is creating a   in the_excerpt. How do I remove it?
<div class="subtitulo-noticia"><?php the_excerpt(); ?></div>
  creates a space at the beginning of p
Edit: Each space in the_content creates a  , this ends up creating a   in the_excerpt. How do I create spaces in content without creating  
Решение
I'm not sure why there's a non-breaking space being added to the front of your excerpt. It would be best to find out what is putting that there. But in the meantime, you can add this to your theme functions.php ( or a simple plugin ) and it should take care of it.
//* Remove non-breaking space from beginning of paragraph
add_filter( 'the_excerpt', function( $excerpt ) {
return str_replace( [ '<p> ', '<p> ' ], '<p>', $excerpt );
}, 999, 1 );
Другие советы
If you can't get rid of the extra space in the admin, then use trim()
<div class="subtitulo-noticia"><?php echo trim(get_the_excerpt()); ?></div>
Try with:
$text = str_replace( " ","",get_the_excerpt() );
Maybe, replacing  
with an empty string could be fix your problem.
The get_the_excerpt()
function will get your post's excerpt and str_replace()
substitute  
.
This is my working solution:
<?php echo trim(preg_replace('/>\s+</m', '><', get_the_content()));?>