file2string: mark question mark as non-safe

Escaping all question marks as well, they can be used to form
trigraph characters which are effective even within string literal.

1 files changed, 2 insertions, 2 deletions

diff --git a/TOOLS/file2string.pl b/TOOLS/file2string.pl
index d9ad215d6d..341bb06fd6 100755
--- a/TOOLS/file2string.pl
+++ b/TOOLS/file2string.pl
@@ -9,8 +9,8 @@ use warnings;
 # the exact contents of the original file.
 # FIXME: why not a char array?
 
-# treat only alphanumeric and not-" punctuation as safe
-my $unsafe_chars = qr{[^][A-Za-z0-9!#%&'()*+,./:;<=>?^_{|}~ -]};
+# treat only alphanumeric and punctuations (excluding " and ?) as safe
+my $unsafe_chars = qr{[^][A-Za-z0-9!#%&'()*+,./:;<=>^_{|}~ -]};
 
 for my $file (@ARGV) {
     open my $fh, '<:raw', $file or next;