Consider impl From<&str> for KString

[mateuszkj]

I got error while trying to into() from no static str

fn str_to_kstring(s: &str) -> KString {
    s.into()
}

assert_eq!(str_to_kstring("test"), KString::from_ref("test"));

Error

79 |             s.into()
   |               ^^^^ lifetime `'static` required

liquid-rust version:
rust version: rustc 1.56.0 (09c42c458 2021-10-18)
OS: Linux mk-Precision-Tower-7910 5.4.0-89-generic #100-Ubuntu SMP Fri Sep 24 14:50:10 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

[epage]

This is intentional. KString is effectively a smarter Cow<'static, str> and we want to provide an easy path for people to get their &'static str into it.