Consistently use 4 space indentation

Some blocks had accidentally gotten only 2 space indentation.

Author: mstorsjo

gas-preprocessor.pl

@@ -1028,14 +1028,14 @@ sub handle_serialized_line {
             # Convert "ldrb w0, [x0, #-1]" into "ldurb w0, [x0, #-1]".
             # Don't do this for forms with writeback though.
             if ($line =~ /(ld|st)(r[bh]?)\s+(\w+)\s*,\s*\[\s*(\w+)\s*,\s*#([^\]]+)\s*\][^!]/) {
-              my $instr = $1;
-              my $suffix = $2;
-              my $target = $3;
-              my $base = $4;
-              my $offset = eval_expr($5);
-              if ($offset < 0) {
-                $line =~ s/$instr$suffix/${instr}u$suffix/;
-              }
+                my $instr = $1;
+                my $suffix = $2;
+                my $target = $3;
+                my $base = $4;
+                my $offset = eval_expr($5);
+                if ($offset < 0) {
+                    $line =~ s/$instr$suffix/${instr}u$suffix/;
+                }
             }
 
             if ($ENV{GASPP_ARMASM64_INVERT_SCALE}) {