remove some more procedure syntax

Author: bishabosha

_ba/tour/inner-classes.md

@@ -74,7 +74,7 @@ Ako želimo povezati čvorove različitih grafova, moramo promijeniti definiciju
 class Graph {
   class Node {
     var connectedNodes: List[Graph#Node] = Nil
-    def connectTo(node: Graph#Node) {
+    def connectTo(node: Graph#Node): Unit = {
       if (!connectedNodes.exists(node.equals)) {
         connectedNodes = node :: connectedNodes
       }

_es/tour/inner-classes.md

@@ -70,7 +70,7 @@ Por favor note que en Java la última linea del ejemplo anterior hubiese sido co
     class Graph {
       class Node {
         var connectedNodes: List[Graph#Node] = Nil   // Graph#Node en lugar de Node
-        def connectTo(node: Graph#Node) {
+        def connectTo(node: Graph#Node): Unit = {
           if (!connectedNodes.exists(node.equals)) {
             connectedNodes = node :: connectedNodes
           }

_ja/tour/inner-classes.md

@@ -69,7 +69,7 @@ Scalaではそのような型も同様に表現することができ、`Graph#No
 class Graph {
   class Node {
     var connectedNodes: List[Graph#Node] = Nil
-    def connectTo(node: Graph#Node) {
+    def connectTo(node: Graph#Node): Unit = {
       if (!connectedNodes.exists(node.equals)) {
         connectedNodes = node :: connectedNodes
       }

_ko/tour/inner-classes.md

@@ -69,7 +69,7 @@ previous-page: lower-type-bounds
     class Graph {
       class Node {
         var connectedNodes: List[Graph#Node] = Nil
-        def connectTo(node: Graph#Node) {
+        def connectTo(node: Graph#Node): Unit = {
           if (!connectedNodes.exists(node.equals)) {
             connectedNodes = node :: connectedNodes
           }

_pl/tour/inner-classes.md

@@ -78,7 +78,7 @@ Warto zwrócić uwagę na to, że ostatnia linia poprzedniego przykładu byłaby
 class Graph {
   class Node {
     var connectedNodes: List[Graph#Node] = Nil
-    def connectTo(node: Graph#Node) {
+    def connectTo(node: Graph#Node): Unit = {
       if (!connectedNodes.exists(node.equals)) {
         connectedNodes = node :: connectedNodes
       }

_pt-br/tour/inner-classes.md

@@ -77,7 +77,7 @@ Observe que em Java a última linha no programa do exemplo anterior é válida.
 class Graph {
   class Node {
     var connectedNodes: List[Graph#Node] = Nil
-    def connectTo(node: Graph#Node) {
+    def connectTo(node: Graph#Node): Unit = {
       if (!connectedNodes.exists(node.equals)) {
         connectedNodes = node :: connectedNodes
       }

_ru/tour/inner-classes.md

@@ -60,7 +60,7 @@ node1.connectTo(node3)      // не работает!
 class Graph {
   class Node {
     var connectedNodes: List[Graph#Node] = Nil
-    def connectTo(node: Graph#Node) {
+    def connectTo(node: Graph#Node): Unit = {
       if (!connectedNodes.exists(node.equals)) {
         connectedNodes = node :: connectedNodes
       }

_zh-cn/tour/inner-classes.md

@@ -63,7 +63,7 @@ node1.connectTo(node3)      // illegal!
 class Graph {
   class Node {
     var connectedNodes: List[Graph#Node] = Nil
-    def connectTo(node: Graph#Node) {
+    def connectTo(node: Graph#Node): Unit = {
       if (!connectedNodes.exists(node.equals)) {
         connectedNodes = node :: connectedNodes
       }