Improve whitespace padding

Change-Id: Ibd2c49ddaa89f2b4f45d502487f0f3af4d0d8901
diff --git a/script/tei2korapxml b/script/tei2korapxml
index c18f941..6e44f95 100755
--- a/script/tei2korapxml
+++ b/script/tei2korapxml
@@ -367,8 +367,8 @@
         $text_line++;
 
         # insert blank before 1st character
-        #(for 2nd line and consecutive lines)
-        s/^(.)/ $1/ if $text_line > 1;
+        # (for 2nd line and consecutive lines)
+        $_ = ' ' . $_ if $text_line > 1;
       }
 
       # add line to buffer