[gcc/devel/rust/master] libproc_macro: Change string format

[gcc/devel/rust/master] libproc_macro: Change string format

[Thomas Schwinge]

https://gcc.gnu.org/g:36ead3c1b56838f091f4b223dcfc68ff91e66b8d

commit 36ead3c1b56838f091f4b223dcfc68ff91e66b8d
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Fri Feb 24 11:16:13 2023 +0100

    libproc_macro: Change string format
    
    Change string format to match older rust version. Inline variable name
    were not available with rust 1.49.
    
    ChangeLog:
    
            * librust/proc_macro/rust/bridge/literal.rs: Change inline
            variable name format to usual empty "{}" along with arguments.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 librust/proc_macro/rust/bridge/literal.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/librust/proc_macro/rust/bridge/literal.rs b/librust/proc_macro/rust/bridge/literal.rs
index c2017ac4d94..080cc1b21d8 100644
--- a/librust/proc_macro/rust/bridge/literal.rs
+++ b/librust/proc_macro/rust/bridge/literal.rs
@@ -255,7 +255,7 @@ impl fmt::Display for Literal {
                     if byte != b'"' && (b' '..=b'z').contains(&byte) {
                         char::try_from(byte).unwrap().fmt(f)?;
                     } else {
-                        write!(f, "\\x{byte:02x}")?;
+                        write!(f, "\\x{:02x}", byte)?;
                     }
                 }
                 f.write_str("b\"")?;
@@ -266,8 +266,8 @@ impl fmt::Display for Literal {
                     '\'' => f.write_str("'\\''")?,
                     '\0' => f.write_str("'\\0'")?,
                     '\n' => f.write_str("'\\n'")?,
-                    ' '..='z' => write!(f, "'{ch}'")?,
-                    _ => write!(f, "'\\u{val:x}'")?,
+                    ' '..='z' => write!(f, "'{}'", ch)?,
+                    _ => write!(f, "'\\u{:x}'", val)?,
                 }
             }
             Literal::Unsigned(val, suffixed) => match val {