nostd fixes

Author: lovasoa

src/ast/query.rs

@@ -979,7 +979,7 @@ impl fmt::Display for ReplaceSelectElement {
 
 impl fmt::Display for SelectItem {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        use std::fmt::Write;
+        use core::fmt::Write;
         match &self {
             SelectItem::UnnamedExpr(expr) => expr.fmt(f),
             SelectItem::ExprWithAlias { expr, alias } => {

src/display_utils.rs

@@ -1,4 +1,4 @@
-use std::fmt::{self, Display, Write};
+use core::fmt::{self, Display, Write};
 
 /// A wrapper around a value that adds an indent to the value when displayed with {:#}.
 pub(crate) struct Indent<T>(pub T);