diff --git a/Apps/EchartsPharo/EcCalendar.class.st b/Apps/EchartsPharo/EcCalendar.class.st
index 529d11e..772c10e 100644
--- a/Apps/EchartsPharo/EcCalendar.class.st
+++ b/Apps/EchartsPharo/EcCalendar.class.st
@@ -10,7 +10,7 @@ Class {
 { #category : #accessing }
 EcCalendar >> asEcScript [
 
-	^ 'var myCalendar = echarts.init(document.getElementById(',($' asString), 'calendar', ($' asString), '));', Character cr asString,
+	^ 'var myCalendar = echarts.init(document.getElementById(','''', 'calendar', '''', '));', Character cr asString,
 	'var option = {
     tooltip: {},
     animation: true,
@@ -18,28 +18,28 @@ EcCalendar >> asEcScript [
 
     legend: {
         data:', self eventsLabel, ',',
-        'left:', ($' asString ), '0',($' asString),
+        'left:', '''', '0', '''',
     '},
 
     calendar: {
-    top:', ($' asString), 'middle', ($' asString), ',',
-    'left:', ($' asString),'0', ($' asString), ',',
-    'orient:', ($' asString), 'horizontal', ($' asString), ',',
+    top:', '''', 'middle', '''', ',',
+    'left:', '''','0', '''', ',',
+    'orient:', '''', 'horizontal', '''', ',',
     'cellSize: 40,
     yearLabel: {
       margin: 50,
       fontSize: 30,
-      color:', ($' asString), '#999', ($' asString),
+      color:', '''', '#999', '''',
     '},
     dayLabel: {
       firstDay: 1,
-      nameMap:', ($' asString), 'cn', ($' asString),
+      nameMap:', '''', 'cn', '''',
     '},
     monthLabel: {
-      nameMap:', ($' asString),'cn', ($' asString), ',',
+      nameMap:', '''','cn', '''', ',',
       'margin: 15,
       fontSize: 20,
-      color:', ($' asString), '#999', ($' asString),
+      color:', '''', '#999', '''',
     '},
         range:', self datesRangeWithMarginString,
     '},
@@ -92,7 +92,7 @@ EcCalendar >> datesRangeWithMargin [
 EcCalendar >> datesRangeWithMarginString [
 
 	| datesRangeTemp |
-	datesRangeTemp := self datesRangeWithMargin collect: [ :date | ($' asString), date yyyymmdd, ($' asString) ].
+	datesRangeTemp := self datesRangeWithMargin collect: [ :date | '''', date yyyymmdd, '''' ].
 	^ '[', (',' join: datesRangeTemp), ']'
 ]
 
@@ -115,6 +115,6 @@ EcCalendar >> eventsLabel [
 
 	| tempEvents |
 	tempEvents := self events collect: [ :each | each name ].
-	tempEvents := tempEvents collect: [ :each | ($' asString), each, ($' asString) ].
+	tempEvents := tempEvents collect: [ :each | '''', each, '''' ].
 	^ '[', (',' join: tempEvents), ']'
 ]
diff --git a/Apps/EchartsPharo/EcEvent.class.st b/Apps/EchartsPharo/EcEvent.class.st
index 5a35912..be85390 100644
--- a/Apps/EchartsPharo/EcEvent.class.st
+++ b/Apps/EchartsPharo/EcEvent.class.st
@@ -14,17 +14,17 @@ Class {
 { #category : #accessing }
 EcEvent >> asStringSnippet [
 
-	^ '{ type:', ($' asString), self type,($' asString), ',
-		name:', ($' asString), self name,($' asString), ',
-		edgeSymbol: [',($' asString),'none',($' asString),',',($' asString),'arrow',($' asString),'],
-		coordinateSystem:',($' asString),'calendar',($' asString),',
+	^ '{ type:', '''', self type, '''', ',
+		name:', '''', self name, '''', ',
+		edgeSymbol: [', '''','none', '''',',', '''','arrow', '''', '],
+		coordinateSystem:', '''','calendar', '''',',
 		symbolSize: 15,
 		itemStyle: {
-  			color:', ($' asString),'#',self color asHexString,($' asString),',
+  			color:', '''','#',self color asHexString, '''',',
   			shadowBlur: 9,
   			shadowOffsetX: 1.5,
   			shadowOffsetY: 3,
-  			shadowColor:',($' asString),'#555',($' asString),
+  			shadowColor:', '''','#555', '''',
 			'},
 			data:', self datesAsString, ',
 			z: 3 
@@ -63,7 +63,7 @@ EcEvent >> datesAsString [
 	tempDates ifNil: [ ^ self ].
 	tempDates := tempDates collect: [ :each | each asDate ].
 	tempDates := tempDates collect: [ :date |
-		'[', ($' asString), date asDate yyyymmdd,($' asString) ].
+		'[', '''', date asDate yyyymmdd,'''' ].
 	datesCount := OrderedCollection new.
 	tempDates doWithIndex: [ :date :i | datesCount add: (date, ',', (i asString), ']') ].
 	^ '[', (',' join: datesCount ), ']'