4 files changed, 16 insertions, 16 deletions
diff --git a/challenge-028/paulo-custodio/perl/ch-1.pl b/challenge-028/paulo-custodio/perl/ch-1.pl
index 40749c06b2..cb66cbf59c 100644
--- a/challenge-028/paulo-custodio/perl/ch-1.pl
+++ b/challenge-028/paulo-custodio/perl/ch-1.pl
@@ -12,8 +12,8 @@ use Modern::Perl;
 
 my $file = shift or die "Usage: $0 file\n";
 if (-T $file) {
-	say "The file content is ascii.";
+    say "The file content is ascii.";
 }
 else {
-	say "The file content is binary.";
+    say "The file content is binary.";
 }
diff --git a/challenge-028/paulo-custodio/perl/ch-2.pl b/challenge-028/paulo-custodio/perl/ch-2.pl
index 56e995663d..6664df0349 100644
--- a/challenge-028/paulo-custodio/perl/ch-2.pl
+++ b/challenge-028/paulo-custodio/perl/ch-2.pl
@@ -88,19 +88,19 @@ my $CLEAR = "\e[H\e[2J";
 my $HOME  = "\e[H";
 
 sub banner {
-	my($text) = @_;
-	for my $row (0 .. $#{$chars{' '}}) {
-		for my $c (split(//, $text)) {
-			print $chars{$c}[$row];
-		}
-		print "\n";
-	}
+    my($text) = @_;
+    for my $row (0 .. $#{$chars{' '}}) {
+        for my $c (split(//, $text)) {
+            print $chars{$c}[$row];
+        }
+        print "\n";
+    }
 }
 
 print $CLEAR;
 while (1) {
-	my $time = strftime("%H:%M:%S", localtime(time));
-	print $HOME;
-	banner($time);
-	usleep(500*1000);
+    my $time = strftime("%H:%M:%S", localtime(time));
+    print $HOME;
+    banner($time);
+    usleep(500*1000);
 }
diff --git a/challenge-028/paulo-custodio/python/ch-2.py b/challenge-028/paulo-custodio/python/ch-2.py
index 51771c3ad9..a96d8442f9 100644
--- a/challenge-028/paulo-custodio/python/ch-2.py
+++ b/challenge-028/paulo-custodio/python/ch-2.py
@@ -9,7 +9,7 @@
 from datetime import datetime
 import time
 
-chars = { 
+chars = {
     ' ': ["      ",
           "      ",
           "      ",
diff --git a/challenge-028/paulo-custodio/t/test-1.yaml b/challenge-028/paulo-custodio/t/test-1.yaml
index 866183cedc..764f673b5c 100644
--- a/challenge-028/paulo-custodio/t/test-1.yaml
+++ b/challenge-028/paulo-custodio/t/test-1.yaml
@@ -1,9 +1,9 @@
 - setup:    system("gcc -otest test.c")==0
-  cleanup:  
+  cleanup:
   args:     test.c
   input:
   output:   The file content is ascii.
-- setup:    
+- setup:
   cleanup:  unlink("test.o", "test")
   args:     test
   input: