Changes imported from Abseil "staging" branch:

- b7ac57541b07fadc3ed054cc3d62bc192a2098a7 Redefine arithmetic assign operators in terms of the bina... by Alex Strelnikov <strel@google.com>
  - bb2bf3fd86eb9f24420376aad1b9fe84068ad7e4 Cmake CI for Ubuntu by Jon Cohen <cohenjon@google.com>
  - 3ff3e6d6b4d99627f0785cad5b562362bdf1ae37 Fix internal namespace (debug_internal -> debugging_inter... by Derek Mauro <dmauro@google.com>
  - b50753d757c95a3430cc2d6cfc0272af1e5c219c Internal change. by Alex Strelnikov <strel@google.com>

GitOrigin-RevId: b7ac57541b07fadc3ed054cc3d62bc192a2098a7
Change-Id: I7561639e296d1cc5dc7ee75e6645e8dae3f1bf97

absl/debugging/internal/address_is_readable.cc

@@ -20,12 +20,12 @@
 #if !defined(__linux__) || defined(__ANDROID__)
 
 namespace absl {
-namespace debug_internal {
+namespace debugging_internal {
 
 // On platforms other than Linux, just return true.
 bool AddressIsReadable(const void* /* addr */) { return true; }
 
-}  // namespace debug_internal
+}  // namespace debugging_internal
 }  // namespace absl
 
 #else
@@ -40,7 +40,7 @@ bool AddressIsReadable(const void* /* addr */) { return true; }
 #include "absl/base/internal/raw_logging.h"
 
 namespace absl {
-namespace debug_internal {
+namespace debugging_internal {
 
 // Pack a pid and two file descriptors into a 64-bit word,
 // using 16, 24, and 24 bits for each respectively.
@@ -127,7 +127,7 @@ bool AddressIsReadable(const void *addr) {
   return bytes_written == 1;
 }
 
-}  // namespace debug_internal
+}  // namespace debugging_internal
 }  // namespace absl
 
 #endif