Fix String.split/3 example in guide and add note in docs (#14223) · elixir-lang/elixir@8e61baa

Name	Size	Digest
Docs Expired	6.13 MB	`sha256:a1060b43c4cb28cd1c6eca446f821c8b986bc6d3a22dfdc926ced6d3de217ae4`
build-linux-elixir-otp-25 Expired	7.52 MB	`sha256:ceeaa9edd011356f923d574ff643cb741309c06def94d195b980ca5530c12a75`
build-linux-elixir-otp-26 Expired	7.44 MB	`sha256:1330219acada2a065b130ec8eec9f53617ba9e423d4fc14c0359d76631664ea8`
build-linux-elixir-otp-27 Expired	7.44 MB	`sha256:dc7178d034cc9c950bf42d4ed67e183c4f7104ec9e4e11aeb239b05d556b596b`
build-windows-elixir-otp-25 Expired	7.59 MB	`sha256:9d87a42e49545a0d026d4d17f7d566209b859bcdafed53a7d912d47367066148`
build-windows-elixir-otp-26 Expired	7.51 MB	`sha256:9cc076fe963313e27a1300fdda2ea0b408e882499646c1269383a6321762d45a`
build-windows-elixir-otp-27 Expired	7.51 MB	`sha256:def19ba2560515243203886a04aa1ad1bbe22f72159deedf88e7357088ee6ee8`
sign-linux-elixir-otp-25 Expired	7.53 MB	`sha256:576e7793dd83b04041c4c0ba4e7f16b8088f99485ba2dc2e3988d76f0117b689`
sign-linux-elixir-otp-26 Expired	7.45 MB	`sha256:c1f154b8a229d9f2cde00d9db1e0e05cebc310decd14c7085ec36d52682e04a2`
sign-linux-elixir-otp-27 Expired	7.45 MB	`sha256:afca750f619567dacc7552ae45ce3b06a6f51912f0e00ed5048a0c8ee6b987d1`
sign-windows-elixir-otp-25 Expired	7.61 MB	`sha256:49317e10cec6e0d50e0d4545ffab7cf6bd208cb461927968c8166c89b58dae9c`
sign-windows-elixir-otp-26 Expired	7.52 MB	`sha256:e17f33175287d2333478bc77d6389ee48fefcf495ddbc0af2ae12f45c35ee27e`
sign-windows-elixir-otp-27 Expired	7.53 MB	`sha256:0a883378a919a5e9005092fbc083c27d08ccb30f8d2ad0f840489cfa93dcd148`

Provide feedback