You are allowed to use underscores (underbars) in numeric literals for
legibility, as long as the underscores are spaced at least one digit
-apart, and they do not begin or end the integer or fractional part.
-You could, for example, group binary digits by threes (as for
-a Unix-style mode argument such as 0b110_100_100) or by fours
-(to represent nibbles, as in 0b1010_0110) or in other groups.
+apart, and they do not begin or end the integer or fractional part of
+a decimal constant. You could, for example, group binary digits by
+threes (as for a Unix-style mode argument such as 0b110_100_100) or by
+fours (to represent nibbles, as in 0b1010_0110) or in other groups.
(Note that if you try to begin a number with an underscore, it won't
even be understood as a number, it will be understood as a bareword,
=item Misplaced _ in number
(W syntax) An underscore (underbar) in a numeric constant either
-immediately followed an earlier underscore, or an underscore began or
-ended a numeric constant, or its fractional part (in the case of
-decimal constants) began or ended with an underscore.
+immediately followed an earlier underscore; or an underscore ended a
+numeric constant, or, in the case of decimal constants, an underscore
+began or ended its fractional part. (If you try to begin a numerical
+constant with an underscore, it won't even be recognized as a number.)
=item Missing %sbrace%s on \N{}