lahodaj commented on a change in pull request #2791:
URL: https://github.com/apache/netbeans/pull/2791#discussion_r605024476



##########
File path: 
java/java.source.base/src/org/netbeans/modules/java/source/save/CasualDiff.java
##########
@@ -1954,6 +1961,14 @@ protected int diffCase(JCCase oldT, JCCase newT, int[] 
bounds) {
             endpos = endPos(oldPatterns.get(oldPatterns.size() - 1));
 
             if (newPatterns.isEmpty()) {
+                if(copyTo > localPointer){

Review comment:
       I guess you might need to use the lexer (there is a tokensequence in 
this class that can be used, IIRC) to find the end offset to copy. The code 
below will copy only spaces - but indent may be done using tabs, or even may 
contain comments. Finding the keyword using lexical tokens is probably easiest.




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