Test

Fix GH-21548: Dom\XMLDocument::C14N() emits duplicate xmlns declarati… #1075

Job	Run time
Generate Matrix	9s
Suite / LINUX_X32_DEBUG_ZTS	1m 23s
Suite / LINUX_X64_ASAN_DEBUG_ZTS	1m 26s
Suite / ALPINE_X64_ASAN_DEBUG_ZTS	41s
Suite / LINUX_X64_RELEASE_NTS	1m 32s
Suite / WINDOWS_X64_ZTS	49s
Suite / MACOS_ARM64_DEBUG_NTS	31s
Suite / BENCHMARKING	26s
Suite / FREEBSD_NTS	36s
Suite / OPCACHE_VARIATION	0s
Suite / SOLARIS	0s
Suite / COVERAGE	0s
Suite / MSAN	0s
Suite / LIBMYSQLCLIENT	0s
Suite / LINUX_PPC64_ASAN_DEBUG_ZTS	0s
Suite / COMMUNITY_${{ matrix.type }}	0s
Suite / PECL	0s
	7m 33s

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