bpf: bpftool: Fix newline and p_err issue

This patch fixes a few newline issues and also
replaces p_err with p_info in prog.c

Fixes: b053b439 ("bpf: libbpf: bpftool: Print bpf_line_info during prog dump")
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

tools/bpf/bpftool/Documentation/bpftool-prog.rst

@@ -73,6 +73,7 @@ DESCRIPTION
 		  be displayed by default.  If **linum** is specified,
 		  the filename, line number and line column will also be
 		  displayed on top of the source line.
+
 	**bpftool prog dump jited**  *PROG* [{ **file** *FILE* | **opcodes** | **linum** }]
 		  Dump jited image (host machine code) of the program.
 		  If *FILE* is specified image will be written to a file,
@@ -84,6 +85,7 @@ DESCRIPTION
 		  be displayed by default.  If **linum** is specified,
 		  the filename, line number and line column will also be
 		  displayed on top of the source line.
+
 	**bpftool prog pin** *PROG* *FILE*
 		  Pin program *PROG* as *FILE*.
 

tools/bpf/bpftool/main.h

@@ -194,7 +194,6 @@ void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
 		       const struct bpf_prog_linfo *prog_linfo,
 		       __u64 func_ksym, unsigned int func_idx,
 		       bool linum)
-
 {
 }
 static inline int disasm_init(void)

tools/bpf/bpftool/prog.c

@@ -592,7 +592,6 @@ static int do_dump(int argc, char **argv)
 	info.jited_line_info_rec_size = jited_linfo_rec_size;
 	info.jited_line_info = ptr_to_u64(jited_linfo);
 
-
 	err = bpf_obj_get_info_by_fd(fd, &info, &len);
 	close(fd);
 	if (err) {
@@ -674,7 +673,7 @@ static int do_dump(int argc, char **argv)
 	if (linfo_cnt) {
 		prog_linfo = bpf_prog_linfo__new(&info);
 		if (!prog_linfo)
-			p_err("error in processing bpf_line_info.  continue without it.");
+			p_info("error in processing bpf_line_info.  continue without it.");
 	}
 
 	if (filepath) {