pipe.2: ffix

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

man2/pipe.2

@@ -39,13 +39,13 @@ pipe, pipe2 \- create pipe
 .SH SYNOPSIS
 .nf
 .B #include <unistd.h>
-.sp
+.PP
 .BI "int pipe(int " pipefd "[2]);"
-.sp
+.PP
 .BR "#define _GNU_SOURCE" "             /* See feature_test_macros(7) */"
 .BR "#include <fcntl.h>" "              /* Obtain O_* constant definitions */
 .B #include <unistd.h>
-.sp
+.PP
 .BI "int pipe2(int " pipefd "[2], int " flags );
 .fi
 .SH DESCRIPTION
@@ -63,7 +63,7 @@ Data written to the write end of the pipe is buffered by the kernel
 until it is read from the read end of the pipe.
 For further details, see
 .BR pipe (7).
-
+.PP
 If
 .IR flags
 is 0, then
@@ -135,7 +135,7 @@ On success, zero is returned.
 On error, \-1 is returned, and
 .I errno
 is set appropriately.
-
+.PP
 On Linux (and other systems),
 .BR pipe ()
 does not modify
@@ -178,7 +178,7 @@ version 2.9.
 .SH CONFORMING TO
 .BR pipe ():
 POSIX.1-2001, POSIX.1-2008.
-
+.PP
 .BR pipe2 ()
 is Linux-specific.
 .SH EXAMPLE
@@ -198,7 +198,7 @@ command-line argument to the pipe,
 and the child reads this string a byte at a time from the pipe
 and echoes it on standard output.
 .SS Program source
-.nf
+.EX
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <stdio.h>
@@ -247,7 +247,7 @@ main(int argc, char *argv[])
         exit(EXIT_SUCCESS);
     }
 }
-.fi
+.EE
 .SH SEE ALSO
 .BR fork (2),
 .BR read (2),