Apply suggestions from code review

Co-authored-by: Harry Maclean <hmac@github.com>

ruby/extractor/src/diagnostics.rs

@@ -215,52 +215,52 @@ impl DiagnosticMessage {
         }
     }
 
-    pub fn text<'a>(&'a mut self, text: &str) -> &'a mut Self {
+    pub fn text(&mut self, text: &str) -> &mut Self {
         self.plaintext_message = text.to_owned();
         self
     }
 
     #[allow(unused)]
-    pub fn markdown<'a>(&'a mut self, text: &str) -> &'a mut Self {
+    pub fn markdown(&mut self, text: &str) -> &mut Self {
         self.markdown_message = text.to_owned();
         self
     }
-    pub fn severity<'a>(&'a mut self, severity: Severity) -> &'a mut Self {
+    pub fn severity(&mut self, severity: Severity) -> &mut Self {
         self.severity = Some(severity);
         self
     }
     #[allow(unused)]
-    pub fn help_link<'a>(&'a mut self, link: &str) -> &'a mut Self {
+    pub fn help_link(&mut self, link: &str) -> &mut Self {
         self.help_links.push(link.to_owned());
         self
     }
     #[allow(unused)]
-    pub fn internal<'a>(&'a mut self) -> &'a mut Self {
+    pub fn internal(&mut self) -> &mut Self {
         self.internal = true;
         self
     }
     #[allow(unused)]
-    pub fn cli_summary_table<'a>(&'a mut self) -> &'a mut Self {
+    pub fn cli_summary_table(&mut self) -> &mut Self {
         self.visibility.cli_summary_table = true;
         self
     }
-    pub fn status_page<'a>(&'a mut self) -> &'a mut Self {
+    pub fn status_page(&mut self) -> &mut Self {
         self.visibility.status_page = true;
         self
     }
     #[allow(unused)]
-    pub fn telemetry<'a>(&'a mut self) -> &'a mut Self {
+    pub fn telemetry(&mut self) -> &mut Self {
         self.visibility.telemetry = true;
         self
     }
-    pub fn location<'a>(
+    pub fn location(
-        &'a mut self,
+        &mut self,
         path: &str,
         start_line: usize,
         start_column: usize,
         end_line: usize,
         end_column: usize,
-    ) -> &'a mut Self {
+    ) -> &mut Self {
         let loc = self.location.get_or_insert(Default::default());
         loc.file = Some(path.to_owned());
         loc.start_line = Some(start_line);

ruby/extractor/src/extractor.rs

@@ -588,8 +588,8 @@ fn location_for(visitor: &mut Visitor, n: Node) -> (usize, usize, usize, usize)
         if index > 0 && index <= source.len() {
             index -= 1;
             if source[index] != b'\n' {
-                &visitor.diagnostics_writer.write(
+                visitor.diagnostics_writer.write(
-                    &visitor
+                    visitor
                         .diagnostics_writer
                         .message("internal-error", "Internal error")
                         .text("expecting a line break symbol, but none found while correcting end column value")
@@ -604,8 +604,8 @@ fn location_for(visitor: &mut Visitor, n: Node) -> (usize, usize, usize, usize)
                 end_col += 1;
             }
         } else {
-            &visitor.diagnostics_writer.write(
+            visitor.diagnostics_writer.write(
-                &visitor
+                visitor
                     .diagnostics_writer
                     .message("internal-error", "Internal error")
                     .text(&format!(

ruby/extractor/src/main.rs

@@ -67,12 +67,12 @@ fn main() -> std::io::Result<()> {
         )
         .init();
     let diagnostics = diagnostics::DiagnosticLoggers::new("ruby");
-    let main_thread_logger = &mut diagnostics.logger();
+    let mut main_thread_logger = diagnostics.logger();
     let num_threads = match num_codeql_threads() {
         Ok(num) => num,
         Err(e) => {
             main_thread_logger.write(
-                &main_thread_logger
+                main_thread_logger
                     .message("configuration-error", "Configuration error")
                     .text(&format!("{}; defaulting to 1 thread.", e))
                     .status_page()
@@ -94,7 +94,7 @@ fn main() -> std::io::Result<()> {
         Ok(x) => x,
         Err(e) => {
             main_thread_logger.write(
-                &main_thread_logger
+                main_thread_logger
                     .message("configuration-error", "Configuration error")
                     .text(&format!("{}; using gzip.", e))
                     .status_page()
@@ -198,7 +198,7 @@ fn main() -> std::io::Result<()> {
                                     Err(msg) => {
                                         needs_conversion = false;
                                         diagnostics_writer.write(
-                                            &diagnostics_writer
+                                            diagnostics_writer
                                                 .message(
                                                     "character-encoding-error",
                                                     "Character encoding error",
@@ -217,7 +217,7 @@ fn main() -> std::io::Result<()> {
                             }
                         } else {
                             diagnostics_writer.write(
-                                &diagnostics_writer
+                                diagnostics_writer
                                     .message("character-encoding-error", "Character encoding error")
                                     .text(&format!(
                                         "{}: unknown character encoding: '{}'",