[Doc] Fix gradle commands typo. (#220)

Author: jaychang0917

Plugins/Gradle/README.md

@@ -74,7 +74,7 @@ You can customize the destination path and file name for the report file by prov
 Example:
 
 ```bash
-./gradlew :reportPull -PreportPath="/user/testify/" -PreportFileName="my-report.yml"
+./gradlew Sample:reportPull -PreportPath="/user/testify/" -PreportFileName="my-report.yml"
 ```
 
 ### reportShow
@@ -183,4 +183,4 @@ Verify that the ImageMagick tools required for diff images are installed. The `g
 Verify that the ImageMagick tools required for diff images are installed
 ------------------------------------------------------------
   Compare               = true
-```
+```

README.md

@@ -83,31 +83,31 @@ Testify works by referencing a PNG baseline found in your `androidTest/assets` d
 Run all the screenshot tests in your app and update the local baseline.
 
 ```bash
-./gradlew :screenshotRecord
+./gradlew screenshotRecord
 ```
 
 ### Verify the tests
 
 Run all the screenshot tests in your app and fail if any differences from the baseline are detected.
 
 ```bash
-./gradlew :screenshotTest
+./gradlew screenshotTest
 ```
 
 ### Pull images from the device
 
 Copy images from the `app_images` directory on your emulator to your local `androidTest/assets` directory.
 
 ```bash
-./gradlew :screenshotPull
+./gradlew screenshotPull
 ```
 
 ### Erase any existing images from the device
 
 Clear any baseline images that may be remaining on your emulator.
 
 ```bash
-./gradlew :screenshotClear
+./gradlew screenshotClear
 ```
 
 ### Generate a YAML test report
@@ -116,11 +116,11 @@ You can optionally generate a YAML test report for offline parsing by adding `<m
 Once enabled, Testify will create a `report.yml` cataloging the statistics about the most recent test run.
 You can view the report with:
 ```bash
-./gradlew :reportShow
+./gradlew reportShow
 ```
 You can copy the report.yml file to your local project directory with:
 ```bash
-./gradlew :reportPull
+./gradlew reportPull
 ```
 
 There are a variety of additional Gradle commands available through the Testify plugin. For advance usage, please refer to the [Plugin guide](Plugins/Gradle/README.md).