was perusing the git FAQ and ran across this:

  How do I obtain a list of files which have changed in a given commit?

     $ git diff --name-only <commit>^!


after playing with "git rev-parse", i figured out that the above was
equivalent to (using kernel "v4.19" tag as an example):

$ git diff v4.19 ^v4.19^
diff --git a/Makefile b/Makefile
index bf3786e4ffec..69fa5c0310d8 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,8 @@
 VERSION = 4
 PATCHLEVEL = 19
 SUBLEVEL = 0
-EXTRAVERSION = -rc8
-NAME = Merciless Moray
+EXTRAVERSION =
+NAME = "People's Front"

 # *DOCUMENTATION*
 # To see a list of typical targets execute "make help"
$

  but i get exactly the same output if i reverse the arguments:

$ git diff ^v4.19^ v4.19
diff --git a/Makefile b/Makefile
index bf3786e4ffec..69fa5c0310d8 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,8 @@
 VERSION = 4
 PATCHLEVEL = 19
 SUBLEVEL = 0
-EXTRAVERSION = -rc8
-NAME = Merciless Moray
+EXTRAVERSION =
+NAME = "People's Front"

 # *DOCUMENTATION*
 # To see a list of typical targets execute "make help"

  so i'm confused as to how to "git diff" interprets and processes
those two arguments, as "v4.19" is, of course, a reference to a
specific commit, but "^v4.19^" appears to define all those commits not
reachable from "v4.19^". how should one read this?

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                  http://crashcourse.ca/dokuwiki

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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