Ruby 1.9 strip not removing whitespace?

I think, there are a lot of "space characters". You can use something like this.

Figure out the character code of the last character (str-1. Ord) and explicitly search and destroy it. Rinse/repeat if there exist more unwanted characters after that.

After doing this, report back here what the invisible character was. (Perhaps it's only invisible because the font you are using does not have that glyph?).

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