Auto merge of #51724 - tikue:master, r=Mark-Simulacrum

Re-pub some items whose visibilities were recently reduced.

Reasons described in the most recent comments of #51265.

tarpc can't move off of plugins until proc macros can be reexported from other crates.

Fixes google/tarpc#191

src/libsyntax/parse/mod.rs

@@ -294,7 +294,7 @@ fn char_lit(lit: &str, diag: Option<(Span, &Handler)>) -> (char, isize) {
 
 /// Parse a string representing a string literal into its final form. Does
 /// unescaping.
-fn str_lit(lit: &str, diag: Option<(Span, &Handler)>) -> String {
+pub fn str_lit(lit: &str, diag: Option<(Span, &Handler)>) -> String {
     debug!("str_lit: given {}", lit.escape_default());
     let mut res = String::with_capacity(lit.len());
 

src/libsyntax/parse/parser.rs

@@ -5402,7 +5402,7 @@ impl<'a> Parser<'a> {
     }
 
     /// Parse an impl item.
-    crate fn parse_impl_item(&mut self, at_end: &mut bool) -> PResult<'a, ImplItem> {
+    pub fn parse_impl_item(&mut self, at_end: &mut bool) -> PResult<'a, ImplItem> {
         maybe_whole!(self, NtImplItem, |x| x);
         let attrs = self.parse_outer_attributes()?;
         let (mut item, tokens) = self.collect_tokens(|this| {