refactor(clippy): apply if_not_else lint (#882)

git-cliff-core/src/changelog.rs

@@ -131,10 +131,10 @@ impl<'a> Changelog<'a> {
 							.filter_map(|line| {
 								let mut c = commit.clone();
 								c.message = line.to_string();
-								if !c.message.is_empty() {
-									Self::process_commit(&c, &self.config.git)
-								} else {
+								if c.message.is_empty() {
 									None
+								} else {
+									Self::process_commit(&c, &self.config.git)
 								}
 							})
 							.collect()

git-cliff-core/src/commit.rs

@@ -355,12 +355,12 @@ impl Commit<'_> {
 				}
 			}
 		}
-		if !filter {
-			Ok(self)
-		} else {
+		if filter {
 			Err(AppError::GroupError(String::from(
 				"Commit does not belong to any group",
 			)))
+		} else {
+			Ok(self)
 		}
 	}
 

git-cliff-core/src/repo.rs

@@ -249,10 +249,10 @@ impl Repository {
 						return 0;
 					}
 					let name = entry.name().expect("failed to get entry name");
-					let entry_path = if dir != "," {
-						format!("{dir}/{name}")
-					} else {
+					let entry_path = if dir == "," {
 						name.to_string()
+					} else {
+						format!("{dir}/{name}")
 					};
 					changed_files.push(entry_path.into());
 					0