Escape unprintable chars only, without surrounding quotes

1 files changed, 1 insertions, 5 deletions

diff --git a/pack.c b/pack.c
index 9fecc31a34..440346576b 100644
--- a/pack.c
+++ b/pack.c
@@ -141,7 +141,6 @@ str_associated(VALUE str)
 static void
 unknown_directive(const char *mode, char type, VALUE fmt)
 {
-    VALUE f;
     char unknown[5];
 
     if (ISPRINT(type)) {
@@ -151,10 +150,7 @@ unknown_directive(const char *mode, char type, VALUE fmt)
     else {
         snprintf(unknown, sizeof(unknown), "\\x%.2x", type & 0xff);
     }
-    f = rb_str_quote_unprintable(fmt);
-    if (f != fmt) {
-        fmt = rb_str_subseq(f, 1, RSTRING_LEN(f) - 2);
-    }
+    fmt = rb_str_quote_unprintable(fmt);
     rb_warning("unknown %s directive '%s' in '%"PRIsVALUE"'",
                mode, unknown, fmt);
 }