patchfile

[Globe Trotter]

Hi,

I am wondering how does one go about reading a patchfile? I guess figuring this
out is crucial to writing one so I decided to start there....

--- temp.org date and time
+++ temp  date and time
@@ -1,3 +1,4 @@
......blah-blah....

I understand the first two lines, bit what do the 

-1.3 +1,4 mean?

Or this one?

@@ -47,11 +54,80 @@
....
....

Thanks and best wishes!


		
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