[gcc r12-2282] libstdc++: Remove duplicate #include in <string_view>

[gcc r12-2282] libstdc++: Remove duplicate #include in <string_view>

[Jonathan Wakely]

https://gcc.gnu.org/g:bd1eb556b910fd4853ea83291e495d40adbcdf81

commit r12-2282-gbd1eb556b910fd4853ea83291e495d40adbcdf81
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Jul 13 12:09:37 2021 +0100

    libstdc++: Remove duplicate #include in <string_view>
    
    When I added the new C++23 constructor I added a conditional include of
    <bits/ranges_base.h>, which was already being included unconditionally.
    This removes the unconditional include but changes the condition for the
    other one, so it's used for C++20 as well.
    
    Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
    
    libstdc++-v3/ChangeLog:
    
            * include/std/string_view: Only include <bits/ranges_base.h>
            once, and only for C++20 and later.

Diff:
---
 libstdc++-v3/include/std/string_view | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/libstdc++-v3/include/std/string_view b/libstdc++-v3/include/std/string_view
index 33e2129383a..cfdcf28f026 100644
--- a/libstdc++-v3/include/std/string_view
+++ b/libstdc++-v3/include/std/string_view
@@ -41,11 +41,10 @@
 #include <bits/char_traits.h>
 #include <bits/functional_hash.h>
 #include <bits/range_access.h>
-#include <bits/ranges_base.h>
 #include <bits/ostream_insert.h>
 #include <ext/numeric_traits.h>
 
-#if __cplusplus > 202002L
+#if __cplusplus >= 202002L
 # include <bits/ranges_base.h>
 #endif