Small fixes for `eve::algo::search` docs #2547

Job	Run time
externals (clang, x86, -msse2)	46m 19s
no_pch (clang, x86, -msse2)	57m 46s
externals (gcc, x86, -msse2)	50m 2s
no_pch (gcc, x86, -msse2)	58m 53s
nosimd (clang, x86, -DEVE_NO_SIMD)	38m 44s
arm (clang, aarch64, -Wno-psabi)	31m 33s
arm (clang, arm, -Wno-psabi)	33m 16s
nosimd (gcc, x86, -DEVE_NO_SIMD)	45m 1s
macosx (clang, x86_osx, -mavx)	1h 36m 33s
riscv (clang, riscv, -mrvv-vector-bits=128)	36m 6s
x86-clang (clang, x86, -msse4.2)	13m 51s
x86-clang (clang, x86, -mavx)	17m 14s
x86-clang (clang, x86, -mavx2)	16m 34s
other-arch (gcc, sve256, -Wno-psabi)	52m 15s
other-arch (gcc, sve512, -Wno-psabi)	1h 47m 26s
other-arch (gcc, ppc64, -Wno-psabi)	35m 5s
avx512 (clang, x86, -march=skylake-avx512)	37m 28s
avx512 (gcc, x86, -march=skylake-avx512)	50m 11s
other-cases (clang_libcpp, x86, -msse2)	22m 47s
other-cases (clang, x86, -mavx2 -mbmi2 -DEVE_USE_BMI_ON_AVX2)	29m 42s
other-cases (gcc, x86, -mavx2 -mbmi2 -DEVE_USE_BMI_ON_AVX2)	33m 45s
x86-gcc (gcc, x86, -msse4.2)	17m 58s
x86-gcc (gcc, x86, -mavx)	22m 9s
x86-gcc (gcc, x86, -mavx2)	21m 38s
	16h 12m 16s

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