Rename syntax_pos to rustc_span in source code

src/librustdoc/html/render.rs

@@ -50,6 +50,7 @@ use rustc::middle::stability;
 use rustc::util::nodemap::{FxHashMap, FxHashSet};
 use rustc_data_structures::flock;
 use rustc_feature::UnstableFeatures;
+use rustc_span::hygiene::MacroKind;
 use serde::ser::SerializeSeq;
 use serde::{Serialize, Serializer};
 use syntax::ast;
@@ -57,7 +58,6 @@ use syntax::edition::Edition;
 use syntax::print::pprust;
 use syntax::source_map::FileName;
 use syntax::symbol::{sym, Symbol};
-use syntax_pos::hygiene::MacroKind;
 
 use crate::clean::{self, AttributesExt, Deprecation, GetDefId, SelfTy};
 use crate::config::RenderOptions;