get_maintainer: emit longer section headers

Section headers can be quite long and some are very long and duplicated
for many initial characters.

The current maximum length emitted for a section header is 20 bytes (or
17 bytes then ...  when the section header length is > 20).

Change that length to 50 so more of the section is shown.

Example new output:
$ ./scripts/get_maintainer.pl -f drivers/net/ethernet/broadcom/bnx2x/
Ariel Elior <[email protected]> (supporter:BROADCOM BNX2X 10 GIGABIT ETHERNET DRIVER)
[email protected] (open list:BROADCOM BNX2X 10 GIGABIT ETHERNET DRIVER)
[email protected] (open list)

Old:
$ ./scripts/get_maintainer.pl -f drivers/net/ethernet/broadcom/bnx2x/
Ariel Elior <[email protected]> (supporter:BROADCOM BNX2X 10...)
[email protected] (open list:BROADCOM BNX2X 10...)
[email protected] (open list)

Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

scripts/get_maintainer.pl

@@ -42,6 +42,7 @@
 my $output_separator = ", ";
 my $output_roles = 0;
 my $output_rolestats = 1;
+my $output_section_maxlen = 50;
 my $scm = 0;
 my $web = 0;
 my $subsystem = 0;
@@ -978,8 +979,8 @@ sub get_maintainer_role {
 
  my $role = "unknown";
  my $subsystem = $typevalue[$start];
- if (length($subsystem) > 20) {
- $subsystem = substr($subsystem, 0, 17);
+ if ($output_section_maxlen && length($subsystem) > $output_section_maxlen) {
+ $subsystem = substr($subsystem, 0, $output_section_maxlen - 3);
  $subsystem =~ s/\s*$//;
  $subsystem = $subsystem . "...";
  }
@@ -1021,8 +1022,8 @@ sub get_list_role {
  my $end = find_ending_index($index);
 
  my $subsystem = $typevalue[$start];
- if (length($subsystem) > 20) {
- $subsystem = substr($subsystem, 0, 17);
+ if ($output_section_maxlen && length($subsystem) > $output_section_maxlen) {
+ $subsystem = substr($subsystem, 0, $output_section_maxlen - 3);
  $subsystem =~ s/\s*$//;
  $subsystem = $subsystem . "...";
  }