Code comment add

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/core/Version.java

@@ -148,6 +148,7 @@ public int compareTo(Version other)
                     if (diff == 0) {
                         diff = _patchLevel - other._patchLevel;
                         if (diff == 0) {
+                            // Snapshot: non-snapshot AFTER snapshot, otherwise alphabetical
                             if (isSnapshot()) {
                                 if (other.isSnapshot()) {
                                     diff = _snapshotInfo.compareTo(other._snapshotInfo);