Change tabs to spaces in string literals

compiler/main/DriverPipeline.hs

@@ -1106,18 +1106,18 @@ mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
   "",
   "args: while ($a = shift(@ARGV)) {",
   "    if ( $a eq '+RTS' ) {",
-  "	$in_RTS_args = 1;",
+  "        $in_RTS_args = 1;",
   "    } elsif ( $a eq '-RTS' ) {",
-  "	$in_RTS_args = 0;",
+  "        $in_RTS_args = 0;",
   "    }",
   "    if ( $a eq '-d' && $in_RTS_args ) {",
-  "	$debug = '-';",
+  "        $debug = '-';",
   "    } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
-  "	$nprocessors = $1;",
+  "        $nprocessors = $1;",
   "    } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
-  "	$nprocessors = $1;",
+  "        $nprocessors = $1;",
   "    } else {",
-  "	push(@nonPVM_args, $a);",
+  "        push(@nonPVM_args, $a);",
   "    }",
   "}",
   "",