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I wrote the question alias for cd ../.. and it doesn't accept the title: the .. at the end always disappears.

Bug or feature?

FYI: also applies to this Meta question.

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    Tried quoting the title? I'd guess feature, considering the tendency of people to write ???? and .... – muru Sep 27 '14 at 21:43
  • It seems to be ok if ../.. is put in quotation marks (see edited title) – Thomas Weller Sep 27 '14 at 21:46
  • I know, since I did test that as out an edit (and your edit overwrote my edit). :) – muru Sep 27 '14 at 21:47
  • I was going to test it, but my tests didn't meet the base quality standards for the site. That moment when automated quality checks backfire. – RobotHumans Sep 27 '14 at 21:51
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There is a bit of automated rewriting on titles, that strip punctuation other than question marks (and removes spaces before punctuation marks, too). While most of the time this goes largely unnoticed (when a title “help me i cant read my file!!!!! urgent!!!!!” gets posted as “help me i cant read my file!!!!! urgent”), it does occasionally misfire when the punctuation has a technical meaning as in your case.

However, resolution is easy in your case: you aren't trying to create an alias for cd../.., you're trying to create an alias called cd../... Hence my proposed title: “Can I use cd../.. as an alias name?”

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