... I have no idea what the difference in text color means.

I strongly suspect this is just a documentation bug. As I wrote here, the red/italic rendering appears at a certain line and continues to the end of the table. The template operators (symbols?) (update: specifiers?) so highlighted include ancient  x X @ operators. This highlighting is present even in the earliest on-line documentation: 5.6.0!

Update: The red/italic highlighting always appears at the line

d     A double-precision float in the native format.
even though the layout of the template specifier table changes over documentation versions so that the number of this line changes: line 46 in 5.6.0; line 41 in 5.30.0. (Update: I also don't see any note in the documentation assigning any special meaning to red and/or italic highlighting.)

Give a man a fish:  <%-{-{-{-<

In reply to Re^6: [OT] Endianness and extended precision (80-bit) long doubles by AnomalousMonk
in thread [OT] Endianness and extended precision (80-bit) long doubles by syphilis

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