checkstyle.xml: enforce line wrap indentation of 8 spaces (#1025)

checkstyle.xml: Enforce line wrap indentation of 8 spaces

Let's update the checkstyle.xml file to enforce the indentation
of wrapped lines to be 8 spaces, as required by our coding
standard.

config/checkstyle/checkstyle.xml

@@ -344,6 +344,7 @@
 
     <module name="Indentation">
       <property name="caseIndent" value="0" />
+      <property name="lineWrappingIndentation" value="8" />
     </module>
 
     <module name="NoWhitespaceBefore">

src/test/java/seedu/address/commons/util/StringUtilTest.java

@@ -62,13 +62,13 @@ public void containsWordIgnoreCase_nullWord_throwsNullPointerException() {
     @Test
     public void containsWordIgnoreCase_emptyWord_throwsIllegalArgumentException() {
         assertThrows(IllegalArgumentException.class, "Word parameter cannot be empty", ()
-            -> StringUtil.containsWordIgnoreCase("typical sentence", "  "));
+                -> StringUtil.containsWordIgnoreCase("typical sentence", "  "));
     }
 
     @Test
     public void containsWordIgnoreCase_multipleWords_throwsIllegalArgumentException() {
         assertThrows(IllegalArgumentException.class, "Word parameter should be a single word", ()
-            -> StringUtil.containsWordIgnoreCase("typical sentence", "aaa BBB"));
+                -> StringUtil.containsWordIgnoreCase("typical sentence", "aaa BBB"));
     }
 
     @Test
@@ -132,7 +132,7 @@ public void containsWordIgnoreCase_validInputs_correctResult() {
     @Test
     public void getDetails_exceptionGiven() {
         assertTrue(StringUtil.getDetails(new FileNotFoundException("file not found"))
-            .contains("java.io.FileNotFoundException: file not found"));
+                .contains("java.io.FileNotFoundException: file not found"));
     }
 
     @Test

src/test/java/seedu/address/logic/parser/AddressBookParserTest.java

@@ -127,7 +127,7 @@ public void parseCommand_undoCommandWord_returnsUndoCommand() throws Exception {
     @Test
     public void parseCommand_unrecognisedInput_throwsParseException() {
         assertThrows(ParseException.class, String.format(MESSAGE_INVALID_COMMAND_FORMAT, HelpCommand.MESSAGE_USAGE), ()
-            -> parser.parseCommand(""));
+                -> parser.parseCommand(""));
     }
 
     @Test

src/test/java/seedu/address/logic/parser/ParserUtilTest.java

@@ -44,7 +44,7 @@ public void parseIndex_invalidInput_throwsParseException() {
     @Test
     public void parseIndex_outOfRangeInput_throwsParseException() {
         assertThrows(ParseException.class, MESSAGE_INVALID_INDEX, ()
-            -> ParserUtil.parseIndex(Long.toString(Integer.MAX_VALUE + 1)));
+                -> ParserUtil.parseIndex(Long.toString(Integer.MAX_VALUE + 1)));
     }
 
     @Test

src/test/java/seedu/address/model/person/UniquePersonListTest.java

@@ -165,6 +165,6 @@ public void setPersons_listWithDuplicatePersons_throwsDuplicatePersonException()
     @Test
     public void asUnmodifiableObservableList_modifyList_throwsUnsupportedOperationException() {
         assertThrows(UnsupportedOperationException.class, ()
-            -> uniquePersonList.asUnmodifiableObservableList().remove(0));
+                -> uniquePersonList.asUnmodifiableObservableList().remove(0));
     }
 }

src/test/java/seedu/address/testutil/PersonUtil.java

@@ -35,7 +35,7 @@ public static String getPersonDetails(Person person) {
         sb.append(PREFIX_EMAIL + person.getEmail().value + " ");
         sb.append(PREFIX_ADDRESS + person.getAddress().value + " ");
         person.getTags().stream().forEach(
-            s -> sb.append(PREFIX_TAG + s.tagName + " ")
+                s -> sb.append(PREFIX_TAG + s.tagName + " ")
         );
         return sb.toString();
     }