[readme] formatting

README.md

@@ -47,7 +47,7 @@ The following barcode types are currently supported:
 `success` and `fail` are callback functions. Success is passed an object with data, type and cancelled properties. Data is the text representation of the barcode data, type is the type of barcode detected and cancelled is whether or not the user cancelled the scan.
 
 A full example could be:
-
+```
    var scanner = window.PhoneGap.require("cordova/plugin/BarcodeScanner");
 
    scanner.scan(
@@ -61,7 +61,7 @@ A full example could be:
           alert("Scanning failed: " + error);
       }
    );
-
+```
 
 ## Encoding a Barcode ##
 The plugin creates the object `window.plugins.barcodeScanner` with the method `encode(type, data, success, fail)`. 
@@ -72,6 +72,7 @@ Supported encoding types:
 * PHONE_TYPE
 * SMS_TYPE
 
+```
 A full example could be:
 
    var scanner = window.PhoneGap.require("cordova/plugin/BarcodeScanner");
@@ -82,6 +83,7 @@ A full example could be:
   	        alert("encoding failed: " + fail);
   	      }
   	    );
+```
 
 ## Thanks on Github ##
 
@@ -110,4 +112,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+THE SOFTWARE.