semexpr: small style adjustment

Integrate the `if`/`else` into the enclosing `if`/`else`.

Author: zerbina

compiler/sem/semexprs.nim

@@ -2369,18 +2369,17 @@ proc semProcBody(c: PContext, n: PNode): PNode =
       #   # comment
       # are not expressions:
       fixNilType(c, result)
+    elif result.kind == nkStmtListExpr:
+      # in order to preserve doc comments, apply the return to the last
+      # statement in the list, not to the whole list
+      result.transitionSonsKind(nkStmtList)
+      result.typ = nil
+      let last = semReturn(c, newTreeI(nkReturnStmt, n.info, result[^1]))
+      result[^1] = last
+      if last.kind == nkError:
+        result = c.config.wrapError(result)
     else:
-      if result.kind == nkStmtListExpr:
-        # in order to preserve doc comments, apply the return to the last
-        # statement in the list, not to the whole list
-        result.transitionSonsKind(nkStmtList)
-        result.typ = nil
-        let last = semReturn(c, newTreeI(nkReturnStmt, n.info, result[^1]))
-        result[^1] = last
-        if last.kind == nkError:
-          result = c.config.wrapError(result)
-      else:
-        result = semReturn(c, newTreeI(nkReturnStmt, n.info, result))
+      result = semReturn(c, newTreeI(nkReturnStmt, n.info, result))
   else:
     result = discardCheck(c, result, {})