fix: add new line at the end of the platform's section in order to remove it correctly

Steps to reproduce:
1. `tns create myApp --js`
2. `tns plugin add nativescript-imagepicker` && `tns plugin add nativescript-facebook`
3. Replace the content of `./node_modules/nativescript-imagepicker/platforms/ios/Podfile` with `platform: ios, '9.0'`
4. Replace the content of `./node_modules/nativescript-facebook/platforms/ios/Podfile` with `platform: ios, '10.0'`
5. Add Podfile in `./app/App_Resources/iOS` with the following content `platform: ios: '8.0'`
6. Execute `tns prepare ios`
7. Remove `./app/App_Resources/iOS/Podfile`
8. Execute `tns prepare ios`

Expected behavior: Is should pass correctly and the content of `platforms/ios/Podfile` should be
```
...
# NativeScriptPlatformSection /node_modules/nativescript-facebook/platforms/ios/Podfile with 10.0
       platform :ios, '10.0'
# End NativeScriptPlatformSection
end
```

Actual behavior: It fails with `[!] Invalid `Podfile` file: syntax error, unexpected end-of-input, expecting keyword_end.` error and the the content of `platforms/ios/Podfile` is:
```
...
# NativeScriptPlatformSection /node_modules/nativescript-facebook/platforms/ios/Podfile with 10.0
       platform :ios, '10.0'
# End NativeScriptPlatformSectionend
```

Author: Fatme

lib/services/cocoapods-platform-manager.ts

@@ -118,7 +118,7 @@ export class CocoaPodsPlatformManager implements ICocoaPodsPlatformManager {
 			result += ` ${podfilePlatformData.version}`;
 		}
 
-		result += `${EOL}${podfilePlatformData.content}${EOL}${this.getPlatformSectionFooter()}`;
+		result += `${EOL}${podfilePlatformData.content}${EOL}${this.getPlatformSectionFooter()}${EOL}`;
 		return result;
 	}
 

test/cocoapods-service.ts

@@ -913,6 +913,128 @@ end`
 	describe("remove duplicated platfoms from project podfile", () => {
 		const projectRoot = "my/project/platforms/ios";
 		const projectPodfilePath = path.join(projectRoot, "testProjectPodfilePath");
+		let projectPodfileContent = "";
+
+		beforeEach(() => {
+			cocoapodsService.getProjectPodfilePath = () => projectPodfilePath;
+			projectPodfileContent = "";
+		});
+
+		function setupMocks(pods: any[]): { projectData: IProjectData } {
+			const podsPaths = pods.map(p => p.path);
+			const projectData = testInjector.resolve("projectData");
+			projectData.getAppResourcesDirectoryPath = () => "my/full/path/to/app/App_Resources";
+			projectData.projectName = "projectName";
+
+			const fs = testInjector.resolve("fs");
+			fs.exists = (filePath: string) => projectPodfilePath === filePath || _.includes(podsPaths, filePath);
+			fs.readText = (filePath: string) => {
+				if (filePath === projectPodfilePath) {
+					return projectPodfileContent;
+				}
+
+				const pod = _.find(pods, p => p.path === filePath);
+				if (pod) {
+					return pod.content;
+				}
+			};
+			fs.writeFile = (filePath: string, fileContent: string) => {
+				if (filePath === projectPodfilePath) {
+					projectPodfileContent = fileContent;
+				}
+			};
+			fs.deleteFile = () => ({});
+
+			return { projectData };
+		}
+
+		const testCasesWithApplyAndRemove = [
+			{
+				name: "should select the podfile with highest platform after Podfile from App_Resources has been deleted",
+				pods: [{
+					name: "mySecondPluginWithPlatform",
+					path: "node_modules/  mypath  with spaces/mySecondPluginWithPlatform/Podfile",
+					content: `platform :ios, '10.0'`
+				}, {
+					name: "myPluginWithoutPlatform",
+					path: "node_modules/myPluginWithoutPlatform/Podfile",
+					content: `pod 'myPod' ~> 0.3.4`
+				}, {
+					name: "myFirstPluginWithPlatform",
+					path: "node_modules/myFirstPluginWithPlatform/Podfile",
+					content: `platform :ios, '11.0'`
+				}, {
+					name: "App_Resources",
+					path: "my/full/path/to/app/App_Resources/iOS/Podfile",
+					content: `platform :ios, '8.0'`
+				}],
+				podsToRemove: [{
+					name: "NSPodfileBase",
+					path: "my/full/path/to/app/App_Resources/iOS/Podfile"
+				}],
+				expectedProjectPodfileContentAfterApply: `use_frameworks!
+
+target "projectName" do
+# Begin Podfile - my/full/path/to/app/App_Resources/iOS/Podfile
+# platform :ios, '8.0'
+# End Podfile
+
+# Begin Podfile - node_modules/myFirstPluginWithPlatform/Podfile
+# platform :ios, '11.0'
+# End Podfile
+
+# Begin Podfile - node_modules/myPluginWithoutPlatform/Podfile
+pod 'myPod' ~> 0.3.4
+# End Podfile
+
+# Begin Podfile - node_modules/  mypath  with spaces/mySecondPluginWithPlatform/Podfile
+# platform :ios, '10.0'
+# End Podfile
+
+# NativeScriptPlatformSection my/full/path/to/app/App_Resources/iOS/Podfile with 8.0
+platform :ios, '8.0'
+# End NativeScriptPlatformSection
+end`,
+				expectedProjectPodfileContentAfterRemove: `use_frameworks!
+
+target "projectName" do
+
+# Begin Podfile - node_modules/myFirstPluginWithPlatform/Podfile
+# platform :ios, '11.0'
+# End Podfile
+
+# Begin Podfile - node_modules/myPluginWithoutPlatform/Podfile
+pod 'myPod' ~> 0.3.4
+# End Podfile
+
+# Begin Podfile - node_modules/  mypath  with spaces/mySecondPluginWithPlatform/Podfile
+# platform :ios, '10.0'
+# End Podfile
+# NativeScriptPlatformSection node_modules/myFirstPluginWithPlatform/Podfile with 11.0
+platform :ios, '11.0'
+# End NativeScriptPlatformSection
+end`
+			}
+		];
+
+		_.each(testCasesWithApplyAndRemove, testCase => {
+			it(testCase.name, async () => {
+				const { projectData } = setupMocks(testCase.pods);
+
+				for (const pod of testCase.pods) {
+					await cocoapodsService.applyPodfileToProject(pod.name, pod.path, projectData, projectPodfilePath);
+				}
+
+				assert.deepEqual(projectPodfileContent, testCase.expectedProjectPodfileContentAfterApply);
+
+				for (const pod of testCase.podsToRemove) {
+					await cocoapodsService.removePodfileFromProject(pod.name, pod.path, projectData, projectPodfilePath);
+				}
+
+				assert.deepEqual(projectPodfileContent, testCase.expectedProjectPodfileContentAfterRemove);
+			});
+		});
+
 		const testCases = [
 			{
 				name: "should not change the Podfile when no platform",
@@ -1130,36 +1252,9 @@ end`
 			}
 		];
 
-		beforeEach(() => {
-			cocoapodsService.getProjectPodfilePath = () => projectPodfilePath;
-		});
-
 		_.each(testCases, testCase => {
 			it(testCase.name, async () => {
-				const podsPaths = testCase.pods.map(p => p.path);
-				let projectPodfileContent = "";
-
-				const projectData = testInjector.resolve("projectData");
-				projectData.getAppResourcesDirectoryPath = () => "my/full/path/to/app/App_Resources";
-				projectData.projectName = "projectName";
-
-				const fs = testInjector.resolve("fs");
-				fs.exists = (filePath: string) => projectPodfilePath === filePath || _.includes(podsPaths, filePath);
-				fs.readText = (filePath: string) => {
-					if (filePath === projectPodfilePath) {
-						return projectPodfileContent;
-					}
-
-					const pod = _.find(testCase.pods, p => p.path === filePath);
-					if (pod) {
-						return pod.content;
-					}
-				};
-				fs.writeFile = (filePath: string, fileContent: string) => {
-					if (filePath === projectPodfilePath) {
-						projectPodfileContent = fileContent;
-					}
-				};
+				const { projectData } = setupMocks(testCase.pods);
 				cocoapodsService.removePodfileFromProject = () => ({});
 
 				for (const pod of testCase.pods) {