[slowsmile]

@DSNB . . . I ran my plugin again(more than once) on the same code as you in my test epub:

<p>This is a test <span class="italic"> </span>for<span class="italic"> spaces </span>inside a tag.</p>

I even made sure to download and install the recently updated plugin(now at v0.5.5) in Sigil before running the plugin on the above code and I got this result:

<p>This is a test for <span class="italic">spaces</span> inside a tag.</p>

After plugin run please note in the result that the first <span> with blank space has been completely removed with a single blank space at the start of the second <span>. This is correct plugin behaviour.

Unfortunately, I've run all the same tests that you've run and I'm sorry but I am still unable to emulate your extra-blank-space problem when using the plugin.

I also released a new plugin update(v0.5.5) yesterday. Are you using the updated plugin?