Non-breaking space disappears from the end of block

[Wiktor Walc]

In browsers other than IE (I've checked Firefox, Safari, Opera), the non-breaking space at the end of block is changed into a space.

May have something to do with ​https://bugzilla.mozilla.org/show_bug.cgi?id=437044 (reported by Fred while working on #2248)

Steps to reproduce

• In source mode paste:

  Foo 
  

• Switch to wysiwyg mode
• Type "Bar"
• Result: Foo Bar
• Expected result: Foo Bar

Same issue exists in FCKeditor.

[Piotrek Koszuliński]

Transformation of   to normal space is an expected behaviour.

Imagine such case. You want to write 'foo bar'.

1. You write 'foo'.
2. You type space. This is a space at the end of block, so because of HTML nature this has to be   because otherwise it won't be visible. So you've got 'foo '.
3. You type 'b'. So you expect to have 'foo b'. But imagine what would happen after you typed this 50 times. You would have one, non breakable line of text. Thus, browser has to transform that   to normal space after you typed next characters.