What is the format of a patch file?

Question

What does the following mean ?

diff -rBNu src.orig/java/org/apache/nutch/analysis/NutchAnalysisConstants.java src/java/org/apache/nutch/analysis/NutchAnalysi         


        

Answer 1

The + characters mean that those lines were added since the last version of NutchAnalysisConstants.java. The @@ line is telling you that the diff has jumped to another section of the file, in this case line 39 in the original, or line 43 in the new.