fix: revert unnecessary digit separator changes in non-preprocessor code

clang-scan-deps only parses #if/#else, #include, and import directives,
so digit separators in regular C++ code do not affect module scanning.
Only the __config.hpp change (in a #if directive) is necessary.

Signed-off-by: Pratyksh Gupta <product@revrag.ai>

Author: guptapratykshh

include/exec/detail/bwos_lifo_queue.hpp

@@ -397,10 +397,10 @@ namespace experimental::execution::bwos
 
   template <class Tp, class Allocator>
   lifo_queue<Tp, Allocator>::block_type::block_type(std::size_t block_size, Allocator allocator)
-    : head_{0xFFFFFFFF00000000 | block_size}
+    : head_{0xFFFF'FFFF'0000'0000 | block_size}
     , tail_{block_size}
     , steal_count_{block_size}
-    , steal_tail_{0xFFFFFFFF00000000 | block_size}
+    , steal_tail_{0xFFFF'FFFF'0000'0000 | block_size}
     , ring_buffer_(block_size, allocator)
   {}
 

include/exec/linux/io_uring_context.hpp

@@ -1112,7 +1112,7 @@ namespace experimental::execution
         secs = (std::max) (secs, std::chrono::seconds{0});
         dur  = STDEXEC::__clamp(dur,
                                std::chrono::nanoseconds{0},
-                               std::chrono::nanoseconds{999999999});
+                               std::chrono::nanoseconds{999'999'999});
         return __kernel_timespec{secs.count(), dur.count()};
       }
 #    else
@@ -1130,11 +1130,11 @@ namespace experimental::execution
         __nsec -= __sec;
         __nsec = STDEXEC::__clamp(__nsec,
                                   std::chrono::nanoseconds{0},
-                                  std::chrono::nanoseconds{999999999});
+                                  std::chrono::nanoseconds{999'999'999});
         __timerspec.it_value.tv_sec += __sec.count();
         __timerspec.it_value.tv_nsec = __nsec.count();
         STDEXEC_ASSERT(0 <= __timerspec.it_value.tv_nsec
-                       && __timerspec.it_value.tv_nsec < 1000000000);
+                       && __timerspec.it_value.tv_nsec < 1'000'000'000);
         return __timerspec;
       }
 #    endif

include/exec/windows/filetime_clock.hpp

@@ -27,7 +27,7 @@ namespace experimental::execution::__win32
   {
    public:
     using rep      = std::int64_t;
-    using ratio    = std::ratio<1, 10000000>;  // 100ns
+    using ratio    = std::ratio<1, 10'000'000>;  // 100ns
     using duration = std::chrono::duration<rep, ratio>;
 
     static constexpr bool is_steady = false;