simplify

Author: lovasoa

src/webserver/database/sqlpage_functions/functions.rs

@@ -92,7 +92,7 @@ async fn current_working_directory() -> anyhow::Result<String> {
 async fn environment_variable(name: Cow<'_, str>) -> anyhow::Result<Option<Cow<'_, str>>> {
     match std::env::var(&*name) {
         Ok(value) => Ok(Some(Cow::Owned(value))),
-        Err(std::env::VarError::NotPresent) if name.contains('=') || name.contains('\0') => anyhow::bail!("Invalid environment variable name: {name:?}. Environment variable names cannot contain an equals sign or a null character."),
+        Err(std::env::VarError::NotPresent) if name.contains(['=', '\0']) => anyhow::bail!("Invalid environment variable name: {name:?}. Environment variable names cannot contain an equals sign or a null character."),
         Err(std::env::VarError::NotPresent) => Ok(None),
         Err(err) => Err(err).with_context(|| format!("unable to read the environment variable {name:?}"))
     }