Make test log lines somewhat more eye-scannable

When running tests, our log output should be reasonably readable
by developers, but currently it repeats the module twice (via the
module and file name), and then starts the log line at a variable
location.

Instead, we only print the module and then align the start of the
log lines so that the output is much more scannable.

Author: TheBlueMatt

lightning/src/util/test_utils.rs

@@ -969,8 +969,10 @@ impl Logger for TestLogger {
 	fn log(&self, record: &Record) {
 		*self.lines.lock().unwrap().entry((record.module_path.to_string(), format!("{}", record.args))).or_insert(0) += 1;
 		if record.level >= self.level {
-			#[cfg(all(not(ldk_bench), feature = "std"))]
-			println!("{:<5} {} [{} : {}, {}] {}", record.level.to_string(), self.id, record.module_path, record.file, record.line, record.args);
+			#[cfg(all(not(ldk_bench), feature = "std"))] {
+				let pfx = format!("{} {} [{}:{}]", self.id, record.level.to_string(), record.module_path, record.line);
+				println!("{:<55}{}", pfx, record.args);
+			}
 		}
 	}
 }