Fix comments in the sample spell checker service

Change-Id: I553a9820756f1a6a1164c7a4a66820556cb3fdcc
diff --git a/samples/SampleSpellCheckerService/src/com/example/android/samplespellcheckerservice/SampleSpellCheckerService.java b/samples/SampleSpellCheckerService/src/com/example/android/samplespellcheckerservice/SampleSpellCheckerService.java
index 91a76d8..dc85587 100644
--- a/samples/SampleSpellCheckerService/src/com/example/android/samplespellcheckerservice/SampleSpellCheckerService.java
+++ b/samples/SampleSpellCheckerService/src/com/example/android/samplespellcheckerservice/SampleSpellCheckerService.java
@@ -43,8 +43,9 @@
             }
             final String input = textInfo.getText();
             final int length = input.length();
-            // length <= 3 for too short words
-            // length > 20 for too long words that is possibly CJK words
+            // Just a fake logic:
+            // length <= 3 for short words that we assume are in the fake dictionary
+            // length > 20 for too long words that we assume can't be recognized (such as CJK words)
             final int flags = length <= 3 ? SuggestionsInfo.RESULT_ATTR_IN_THE_DICTIONARY
                     : length <= 20 ? SuggestionsInfo.RESULT_ATTR_LOOKS_LIKE_TYPO : 0;
             return new SuggestionsInfo(flags,