may be specified as names or numeric IDs, there is an
apparent ambiguity.
What if a user or group @emph{name} is a string of digits?
-@footnote{Using a number as a user name is common in some environments.}
Should the command interpret it as a user name or as an ID@?
+(Using a number as a user name is common in some environments.)
POSIX requires that these commands
first attempt to resolve the specified string as a name, and
only once that fails, then try to interpret it as an ID@.
@end example
@noindent
-To specify a tab (@sc{ascii} 0x09) character instead of whitespace, use
-@footnote{the @code{$'\t'} is supported in most modern shells.
-For older shells, use a literal tab}:
+To specify a tab (@sc{ascii} 0x09) character instead of whitespace,
+use:@footnote{the @code{$'\t'} is supported in most modern shells.
+For older shells, use a literal tab.}
@example
@group