[groovy] small fix in iteration over a map

ca-es/groovy-ca.html.markdown

@@ -233,10 +233,12 @@ for (i in array) {
 
 //Itera per un mapa
 def map = ['name':'Roberto', 'framework':'Grails', 'language':'Groovy']
-x = 0
+x = ""
 for ( e in map ) {
     x += e.value
+    x += " "
 }
+assert x.equals("Roberto Grails Groovy ")
 
 /*
   Operadors

es-es/groovy-es.html.markdown

@@ -232,10 +232,12 @@ for (i in array) {
 
 // Iterando sobre un mapa
 def map = ['name':'Roberto', 'framework':'Grails', 'language':'Groovy']
-x = 0
+x = ""
 for ( e in map ) {
     x += e.value
+    x += " "
 }
+assert x.equals("Roberto Grails Groovy ")
 
 /*
   Operadores

groovy.html.markdown

@@ -230,10 +230,12 @@ for (i in array) {
 
 //Iterate over a map
 def map = ['name':'Roberto', 'framework':'Grails', 'language':'Groovy']
-x = 0
+x = ""
 for ( e in map ) {
     x += e.value
+    x += " "
 }
+assert x.equals("Roberto Grails Groovy ")
 
 /*
   Operators

pt-br/groovy-pt.html.markdown

@@ -226,10 +226,12 @@ for (i in array) {
 
 //Itera sobre um mapa
 def map = ['name':'Roberto', 'framework':'Grails', 'language':'Groovy']
-x = 0
+x = ""
 for ( e in map ) {
     x += e.value
+    x += " "
 }
+assert x.equals("Roberto Grails Groovy ")
 
 /*
   Operadores

zh-cn/groovy-cn.html.markdown

@@ -219,10 +219,12 @@ for (i in array) {
 
 //遍历映射
 def map = ['name':'Roberto', 'framework':'Grails', 'language':'Groovy']
-x = 0
+x = ""
 for ( e in map ) {
     x += e.value
+    x += " "
 }
+assert x.equals("Roberto Grails Groovy ")
 
 /*
   运算符