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On the masking of undisplayable characters

From: bruce.connor.am
Subject: On the masking of undisplayable characters
Date: Mon, 6 Jul 2015 18:38:13 +0100

I just noticed we have a feature where we use display tables to mask characters that cannot be displayed.

When this happens, it caused me quite a bit of confusion, as I tried to type one thing and something else got inserted. I eventually thought of investigating the character (which revealed it was being masked by the display table), but many users wouldn't know to do this.

Could we have a message to let the user know when this happens? Something like "undisplayable char being displayed as X".

I know this is meant to be helpful, but displaying something different from what's in the file is a pretty big deal. I'm not entirely sure it should be done without consent, but it definitely shouldn't be done silently.


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