be stricter with tab

Change-Id: I17db9db426b10e0cb2148b33dfc9631ea9cb81a4

git-hooks/pre-commit

@@ -21,16 +21,20 @@ sub check_whitespaces($)
     my $filename;
     my $reported_filename = "";
     my $lineno;
-    sub bad_line {
+    sub bad_line
+    {
         my ($why, $line, $file_filter) = @_;
-        if (!defined $file_filter || $filename =~ /\.($file_filter)$/) {
-	if (!$found_bad) {
+        if (!defined $file_filter || $filename =~ /\.($file_filter)$/)
+        {
+            if (!$found_bad)
+            {
                 print STDERR "*\n";
                 print STDERR "* You have some suspicious patch lines:\n";
                 print STDERR "*\n";
                 $found_bad = 1;
             }
-	if ($reported_filename ne $filename) {
+            if ($reported_filename ne $filename)
+            {
                 print STDERR "* In $filename\n";
                 $reported_filename = $filename;
             }
@@ -39,32 +43,41 @@ sub check_whitespaces($)
         }
     }
     open( FILES, "git-diff-index -p -M --cached $h |" ) ||  die "Cannot run git diff-index.";
-    while (<FILES>) {
-	if (m|^diff --git a/(.*) b/\1$|) {
+    while (<FILES>)
+    {
+        if (m|^diff --git a/(.*) b/\1$|)
+        {
             $filename = $1;
             next;
         }
-	if (/^@@ -\S+ \+(\d+)/) {
+        if (/^@@ -\S+ \+(\d+)/)
+        {
             $lineno = $1 - 1;
             next;
         }
-	if (/^ /) {
+        if (/^ /)
+        {
             $lineno++;
             next;
         }
-	if (s/^\+//) {
+        if (s/^\+//)
+        {
             $lineno++;
             chomp;
-	    if (/\s$/) {
+            if (/\s$/)
+            {
                 bad_line("trailing whitespace", $_ , $src_limited);
             }
-	    if (/^\s* 	/) {
-		bad_line("indent SP followed by a TAB", $_, $src_limited);
+            if (/\s*	/)
+            {
+                bad_line("indent with Tab", $_, $src_limited);
             }
-	    if (/^(?:[<>=]){7}$/) {
+            if (/^(?:[<>=]){7}$/)
+            {
                 bad_line("unresolved merge conflict", $src_full);
             }
-	    if (/SAL_DEBUG/) {
+            if (/SAL_DEBUG/)
+            {
                 bad_line("temporary debug in commit", $_, $src_limited);
             }
         }
@@ -79,7 +92,8 @@ sub check_whitespaces($)
 
 # Initial commit: diff against an empty tree object
 my $against="4b825dc642cb6eb9a060e54bf8d69288fbee4904";
-if ( system( "git rev-parse --verify HEAD >/dev/null 2>&1" ) == 0 ) {
+if ( system( "git rev-parse --verify HEAD >/dev/null 2>&1" ) == 0 )
+{
     $against="HEAD"
 }