gfe-relnote: n/a(test only) fix a GCC complier error in QUIC test utils. Not
protected.

The type limit error is reported in https://github.com/envoyproxy/envoy/pull/10040#issuecomment-588443476

This also fixes the representation of DEL 0x7f to be '.'

PiperOrigin-RevId: 296214588
Change-Id: I94c01491879aa8d776a2ed09a9a6fbce93f73579

common/test_tools/quiche_test_utils.cc

diff --git a/common/test_tools/quiche_test_utils.cc b/common/test_tools/quiche_test_utils.cc
index 0a84635..9bbd44d 100644
--- a/common/test_tools/quiche_test_utils.cc
+++ b/common/test_tools/quiche_test_utils.cc
@@ -43,7 +43,7 @@
     hex = hex + "  ";
 
     for (const char* p = row; p < row + 4 && p < row + length; ++p) {
-      hex += (*p >= 0x20 && *p <= 0x7f) ? (*p) : '.';
+      hex += (*p >= 0x20 && *p < 0x7f) ? (*p) : '.';
     }
 
     hex = hex + '\n';