Warner Losh b891aedcdd awk: Add more details top the FS variable
The current description of the FS is true, but only part of the
truth. Add information about single characters and note that FS="" is
undefined by the standard, though the two other awk implenetations (mawk
and gawk) also have this interpretation.

PR:		226112
Sponsored by:	Netflix
2021-07-19 22:33:26 -06:00
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