Merge pull request #218 from AbdulrahmanAlRammah/UG_AND_ERROR_MESSAGE…

…_CLARITY

docs/UserGuide.md

@@ -278,7 +278,7 @@ _Details coming soon ..._
 * Names can contain any characters at all, including spaces, hyphens, and other special characters.
 * Names will be stored in their case-sensitive form, but capitalisation will be ignored when checking for duplicate names.
   * Eg. Adding a contact as "john Doe" will save them as such, but trying to add a "John Doe" with the same phone number will be marked as a duplicate person and rejected.
-  * To avoid unexpected behaviour with this, it is recommended that users save contacts with consistent capitalisation rules.
+  * Other instances of possible duplicates such as identical names except for extra spaces are not handled.
 
 ### Phone
 * Phones are compulsory for all contacts, and are denoted with the `p/` prefix.

src/main/java/seedu/address/model/person/DateOfLastVisit.java

@@ -15,7 +15,7 @@
 public class DateOfLastVisit implements Comparable<DateOfLastVisit> {
 
     public static final String MESSAGE_CONSTRAINTS = "Date of last visit should be in dd-MM-yyyy format.\n"
-            + "Ensure the date entered is not later than today. ";
+            + "Ensure the date entered is valid and not later than today. ";
 
     public static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("dd-MM-uuuu")
             .withResolverStyle(ResolverStyle.STRICT);