TsunamiZ,
I think I see your point.
In some ways, it is a nice idea; but I have to agree with JRz & the other posters to this thread in that it is neither a big benefit, nor one that any of them would use.
For now, I think you have stated your case. If a few others agree that it would be quite desireable, I will change my mind, and, it may get nikos' attention. (I note that so far it's 4 to 1 for the 'not especially useful' point of view.)
My take on the situation comes down to asking how far I should expect xplorer² to save me from my lack of attention to detail. To what extent should I expect x2 to do what I have in mind, vs do what I tell it to do?
The operative example here is a cut-and-paste where I may have included leading or trailing spaces or other 'blank' characters in a string I want to use as a filename.
Apparently your usage is such that you often include such characters in your 'cuts'; and you seem bothered by the need to go back and correct your choice after the 'paste'. (I see the benefit when that happens.)
While it is feasable to write code to trim the leading and trailing spaces from a paste into the filename block, at this time I believe doing so falls somewhere between a low-priority task and not worth the effort to do at all.
(above discussion composed before I saw your last previous post)
BTW -
I appreciate your enthusiasm for suggesting ideas to improve x2. Please recognize that you are not the only user and that many others use x2 quite differently from you. We try to incude all perspectives when moving forward with ideas. That includes recognizing that there is only one developer for x2 (nikos) and that this is only a part-time effort on his part sandwiched between a day-job and a having a life.
(The rest of us are volunteers who are hooked on x2 and seek to help others use it productively and to make it even better going forward.)
HTH
PS (to you list of space-filled filenames) -
Spaces in filenames make them more readable.
I like them most of the time.