Fix lint issues

Author: planarvoid

media-placeholders/src/main/java/org/wordpress/aztec/placeholders/PlaceholderManager.kt

@@ -157,7 +157,7 @@ class PlaceholderManager(
             selectionStartMinusOne to selectionStart
         } else if (editableText[selectionStartMinusOne] == '\n' && editableText[selectionStartMinusTwo] == Constants.IMG_CHAR) {
             selectionStartMinusTwo to selectionStart
-        } else if (editableText[selectionEndPlusOne] == Constants.IMG_CHAR){
+        } else if (editableText[selectionEndPlusOne] == Constants.IMG_CHAR) {
             selectionEndPlusOne to (selectionEndPlusOne + 1).coerceAtMost(aztecText.length())
         } else if (editableText[selectionEndPlusOne] == '\n' && editableText[selectionEndPlusTwo] == Constants.IMG_CHAR) {
             selectionEndPlusTwo to (selectionEndPlusTwo + 1).coerceAtMost(aztecText.length())

media-placeholders/src/test/java/org/wordpress/aztec/placeholders/PlaceholderTest.kt

@@ -12,7 +12,6 @@ import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.Robolectric
 import org.robolectric.RobolectricTestRunner
-import org.wordpress.aztec.AztecAttributes
 import org.wordpress.aztec.AztecText
 import org.wordpress.aztec.source.SourceViewEditText
 import org.wordpress.aztec.toolbar.AztecToolbar