Understanding git diff on files [duplicate]

问题

This question already has answers here:

What does the “@@…@@” meta line with at signs in svn diff or git diff mean? (3 answers)

Closed 6 years ago.

What does the folowing output of git diff mean?

diff --git a/README.md b/README.md
index 24aa464..49c20f4 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,2 @@
 LINE1
-LINE2
 LINE3

I think I understand that the "-" new LINE2 means that the version on have in workspace does not have the LINE2 that is in staging, but what does @@ -1,3 +1,2 @@ mean??

回答1:

It is the line ranges that the diff is concerned with for that hunk, meaning lines 1 to 3 in a/README.md and lines 1 to 2 in b/README.md.

来源：https://stackoverflow.com/questions/14896469/understanding-git-diff-on-files