format installation-android doc

docs/docs/installation-android.md

@@ -18,71 +18,73 @@
 	
 3. Update `android/build.gradle`
 
-```diff
-buildscript {
-    repositories {
-+        mavenLocal()
-+        mavenCentral()
-+        google()
-+        jcenter()
-    }
-    dependencies {
-+        classpath 'com.android.tools.build:gradle:3.0.1'
--        classpath 'com.android.tools.build:gradle:2.2.3'
-    }
-}
-
-allprojects {
-    repositories {
-        mavenLocal()
-+        mavenCentral()
-+        google()
-        jcenter()
-        maven {
-            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
-            url "$rootDir/../../node_modules/react-native/android"
-        }
-    }
-}
-```
+	```diff
+	buildscript {
+	    repositories {
+	+        mavenLocal()
+	+        mavenCentral()
+	+        google()
+	+        jcenter()
+	    }
+	    dependencies {
+	+        classpath 'com.android.tools.build:gradle:3.0.1'
+	-        classpath 'com.android.tools.build:gradle:2.2.3'
+	    }
+	}
+	
+	allprojects {
+	    repositories {
+	        mavenLocal()
+	+        mavenCentral()
+	+        google()
+	        jcenter()
+	        maven {
+	            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
+	            url "$rootDir/../../node_modules/react-native/android"
+	        }
+	    }
+	}
+	```
 
 4. Update project dependencies in `android/app/build.gradle`.
-```groovy
-android {
-    compileSdkVersion 25
-    buildToolsVersion "27.0.3"
-
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-    ...
-}
-
-dependencies {
-    implementation fileTree(dir: "libs", include: ["*.jar"])
-    implementation "com.android.support:appcompat-v7:25.4.0"
-    implementation "com.facebook.react:react-native:+"
-    implementation project(':react-native-navigation')
-}
-```
+
+	```groovy
+	android {
+	    compileSdkVersion 25
+	    buildToolsVersion "27.0.3"
+	
+	    compileOptions {
+	        sourceCompatibility JavaVersion.VERSION_1_8
+	        targetCompatibility JavaVersion.VERSION_1_8
+	    }
+	    ...
+	}
+	
+	dependencies {
+	    implementation fileTree(dir: "libs", include: ["*.jar"])
+	    implementation "com.android.support:appcompat-v7:25.4.0"
+	    implementation "com.facebook.react:react-native:+"
+	    implementation project(':react-native-navigation')
+	}
+	```
 	
 5. Make sure you're using the new gradle plugin, edit `android/gradle/wrapper/gradle-wrapper.properties`
 
-```diff
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
--distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
-```
+	```diff
+	distributionBase=GRADLE_USER_HOME
+	distributionPath=wrapper/dists
+	zipStoreBase=GRADLE_USER_HOME
+	zipStorePath=wrapper/dists
+	+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+	-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+	```
 
 6. Update `gradle.properties` and disable incremental resource processing
-```diff
-+# Disable incremental resource processing as it broke relase build
-+android.enableAapt2=false
-```
+
+	```diff
+	+# Disable incremental resource processing as it broke relase build
+	+android.enableAapt2=false
+	```
 
 7. In `MainActivity.java` it should extend `com.reactnativenavigation.NavigationActivity` instead of `ReactActivity`.
 
@@ -99,6 +101,7 @@ zipStorePath=wrapper/dists
 	If you have any **react-native** related methods, you can safely delete them.
 
 8. In `MainApplication.java`, add the following
+	
 	```java
 	import com.reactnativenavigation.NavigationApplication;
 
@@ -121,6 +124,7 @@ zipStorePath=wrapper/dists
 	Make sure that `isDebug` methods is implemented.
 
 9. Update `AndroidManifest.xml` and set **android:name** value to `.MainApplication`
+	
 	```xml
 	<application
 		android:name=".MainApplication"