save_post_{$post->post_type} hook returns inconsistent $_POST['tax_input'] format

[jenUnderscore_]

In the save_post_{$post->post_type} hook:

Case 1: If we do not make any changes to the taxonomy $_POST['tax_input'][$term] returns a comma delimited string WITH a space.

Output Example: Maple, Spring, Summer, Winter

Case 2: If we modify the taxonomy (adding or removing), it eliminates the space:

Output Example: Spring,Summer,Winter

Proposed solution, eliminate the space in the first case for consistency.