acct.2: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/acct.2

@@ -35,16 +35,16 @@ acct \- switch process accounting on or off
 .ad l
 .nf
 .B #include <unistd.h>
-.sp
+.PP
 .BI "int acct(const char *" filename );
 .fi
 .ad b
-.sp
+.PP
 .in -4n
 Feature Test Macro Requirements for glibc (see
 .BR feature_test_macros (7)):
 .in
-.sp
+.PP
 .BR acct ():
 .nf
     Since glibc 2.21:
@@ -145,7 +145,7 @@ SVr4, 4.3BSD (but not POSIX).
 .SH NOTES
 No accounting is produced for programs running when a system crash occurs.
 In particular, nonterminating processes are never accounted for.
-
+.PP
 The structure of the records written to the accounting file is described in
 .BR acct (5).
 .SH SEE ALSO