remove redundant returns (clippy::needless_return)

src/librustc_span/source_map.rs

@@ -370,11 +370,11 @@ impl SourceMap {
     pub fn doctest_offset_line(&self, file: &FileName, orig: usize) -> usize {
         match file {
             FileName::DocTest(_, offset) => {
-                return if *offset >= 0 {
-                    orig + *offset as usize
-                } else {
+                if *offset < 0 {
                     orig - (-(*offset)) as usize
-                };
+                } else {
+                    orig + *offset as usize
+                }
             }
             _ => orig,
         }

src/librustdoc/theme.rs

@@ -234,9 +234,7 @@ pub fn load_css_paths(v: &[u8]) -> CssPath {
 }
 
 pub fn get_differences(against: &CssPath, other: &CssPath, v: &mut Vec<String>) {
-    if against.name != other.name {
-        return;
-    } else {
+    if against.name == other.name {
         for child in &against.children {
             let mut found = false;
             let mut found_working = false;