Swap the porcelain and plumbing commands in the git man page

This makes the documentation less confusing to newcomers.

Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/git.txt

@@ -72,188 +72,6 @@ GIT COMMANDS
 We divide git into high level ("porcelain") commands and low level
 ("plumbing") commands.
 
-Low-level commands (plumbing)
------------------------------
-
-Although git includes its
-own porcelain layer, its low-level commands are sufficient to support
-development of alternative porcelains.  Developers of such porcelains
-might start by reading about gitlink:git-update-index[1] and
-gitlink:git-read-tree[1].
-
-We divide the low-level commands into commands that manipulate objects (in
-the repository, index, and working tree), commands that interrogate and
-compare objects, and commands that move objects and references between
-repositories.
-
-Manipulation commands
-~~~~~~~~~~~~~~~~~~~~~
-gitlink:git-apply[1]::
-	Reads a "diff -up1" or git generated patch file and
-	applies it to the working tree.
-
-gitlink:git-checkout-index[1]::
-	Copy files from the index to the working tree.
-
-gitlink:git-commit-tree[1]::
-	Creates a new commit object.
-
-gitlink:git-hash-object[1]::
-	Computes the object ID from a file.
-
-gitlink:git-index-pack[1]::
-	Build pack idx file for an existing packed archive.
-
-gitlink:git-init-db[1]::
-	Creates an empty git object database, or reinitialize an
-	existing one.
-
-gitlink:git-merge-index[1]::
-	Runs a merge for files needing merging.
-
-gitlink:git-mktag[1]::
-	Creates a tag object.
-
-gitlink:git-mktree[1]::
-	Build a tree-object from ls-tree formatted text.
-
-gitlink:git-pack-objects[1]::
-	Creates a packed archive of objects.
-
-gitlink:git-prune-packed[1]::
-	Remove extra objects that are already in pack files.
-
-gitlink:git-read-tree[1]::
-	Reads tree information into the index.
-
-gitlink:git-repo-config[1]::
-	Get and set options in .git/config.
-
-gitlink:git-unpack-objects[1]::
-	Unpacks objects out of a packed archive.
-
-gitlink:git-update-index[1]::
-	Registers files in the working tree to the index.
-
-gitlink:git-write-tree[1]::
-	Creates a tree from the index.
-
-
-Interrogation commands
-~~~~~~~~~~~~~~~~~~~~~~
-
-gitlink:git-cat-file[1]::
-	Provide content or type/size information for repository objects.
-
-gitlink:git-describe[1]::
-	Show the most recent tag that is reachable from a commit.
-
-gitlink:git-diff-index[1]::
-	Compares content and mode of blobs between the index and repository.
-
-gitlink:git-diff-files[1]::
-	Compares files in the working tree and the index.
-
-gitlink:git-diff-stages[1]::
-	Compares two "merge stages" in the index.
-
-gitlink:git-diff-tree[1]::
-	Compares the content and mode of blobs found via two tree objects.
-
-gitlink:git-for-each-ref[1]::
-	Output information on each ref.
-
-gitlink:git-fsck-objects[1]::
-	Verifies the connectivity and validity of the objects in the database.
-
-gitlink:git-ls-files[1]::
-	Information about files in the index and the working tree.
-
-gitlink:git-ls-tree[1]::
-	Displays a tree object in human readable form.
-
-gitlink:git-merge-base[1]::
-	Finds as good common ancestors as possible for a merge.
-
-gitlink:git-name-rev[1]::
-	Find symbolic names for given revs.
-
-gitlink:git-pack-redundant[1]::
-	Find redundant pack files.
-
-gitlink:git-rev-list[1]::
-	Lists commit objects in reverse chronological order.
-
-gitlink:git-show-index[1]::
-	Displays contents of a pack idx file.
-
-gitlink:git-tar-tree[1]::
-	Creates a tar archive of the files in the named tree object.
-
-gitlink:git-unpack-file[1]::
-	Creates a temporary file with a blob's contents.
-
-gitlink:git-var[1]::
-	Displays a git logical variable.
-
-gitlink:git-verify-pack[1]::
-	Validates packed git archive files.
-
-In general, the interrogate commands do not touch the files in
-the working tree.
-
-
-Synching repositories
-~~~~~~~~~~~~~~~~~~~~~
-
-gitlink:git-fetch-pack[1]::
-	Updates from a remote repository (engine for ssh and
-	local transport).
-
-gitlink:git-http-fetch[1]::
-	Downloads a remote git repository via HTTP by walking
-	commit chain.
-
-gitlink:git-local-fetch[1]::
-	Duplicates another git repository on a local system by
-	walking commit chain.
-
-gitlink:git-peek-remote[1]::
-	Lists references on a remote repository using
-	upload-pack protocol (engine for ssh and local
-	transport).
-
-gitlink:git-receive-pack[1]::
-	Invoked by 'git-send-pack' to receive what is pushed to it.
-
-gitlink:git-send-pack[1]::
-	Pushes to a remote repository, intelligently.
-
-gitlink:git-http-push[1]::
-	Push missing objects using HTTP/DAV.
-
-gitlink:git-shell[1]::
-	Restricted shell for GIT-only SSH access.
-
-gitlink:git-ssh-fetch[1]::
-	Pulls from a remote repository over ssh connection by
-	walking commit chain.
-
-gitlink:git-ssh-upload[1]::
-	Helper "server-side" program used by git-ssh-fetch.
-
-gitlink:git-update-server-info[1]::
-	Updates auxiliary information on a dumb server to help
-	clients discover references and packs on it.
-
-gitlink:git-upload-archive[1]::
-	Invoked by 'git-archive' to send a generated archive.
-
-gitlink:git-upload-pack[1]::
-	Invoked by 'git-fetch-pack' to push
-	what are asked for.
-
-
 High-level commands (porcelain)
 -------------------------------
 
@@ -491,6 +309,188 @@ gitlink:git-stripspace[1]::
 	Filter out empty lines.
 
 
+Low-level commands (plumbing)
+-----------------------------
+
+Although git includes its
+own porcelain layer, its low-level commands are sufficient to support
+development of alternative porcelains.  Developers of such porcelains
+might start by reading about gitlink:git-update-index[1] and
+gitlink:git-read-tree[1].
+
+We divide the low-level commands into commands that manipulate objects (in
+the repository, index, and working tree), commands that interrogate and
+compare objects, and commands that move objects and references between
+repositories.
+
+Manipulation commands
+~~~~~~~~~~~~~~~~~~~~~
+gitlink:git-apply[1]::
+	Reads a "diff -up1" or git generated patch file and
+	applies it to the working tree.
+
+gitlink:git-checkout-index[1]::
+	Copy files from the index to the working tree.
+
+gitlink:git-commit-tree[1]::
+	Creates a new commit object.
+
+gitlink:git-hash-object[1]::
+	Computes the object ID from a file.
+
+gitlink:git-index-pack[1]::
+	Build pack idx file for an existing packed archive.
+
+gitlink:git-init-db[1]::
+	Creates an empty git object database, or reinitialize an
+	existing one.
+
+gitlink:git-merge-index[1]::
+	Runs a merge for files needing merging.
+
+gitlink:git-mktag[1]::
+	Creates a tag object.
+
+gitlink:git-mktree[1]::
+	Build a tree-object from ls-tree formatted text.
+
+gitlink:git-pack-objects[1]::
+	Creates a packed archive of objects.
+
+gitlink:git-prune-packed[1]::
+	Remove extra objects that are already in pack files.
+
+gitlink:git-read-tree[1]::
+	Reads tree information into the index.
+
+gitlink:git-repo-config[1]::
+	Get and set options in .git/config.
+
+gitlink:git-unpack-objects[1]::
+	Unpacks objects out of a packed archive.
+
+gitlink:git-update-index[1]::
+	Registers files in the working tree to the index.
+
+gitlink:git-write-tree[1]::
+	Creates a tree from the index.
+
+
+Interrogation commands
+~~~~~~~~~~~~~~~~~~~~~~
+
+gitlink:git-cat-file[1]::
+	Provide content or type/size information for repository objects.
+
+gitlink:git-describe[1]::
+	Show the most recent tag that is reachable from a commit.
+
+gitlink:git-diff-index[1]::
+	Compares content and mode of blobs between the index and repository.
+
+gitlink:git-diff-files[1]::
+	Compares files in the working tree and the index.
+
+gitlink:git-diff-stages[1]::
+	Compares two "merge stages" in the index.
+
+gitlink:git-diff-tree[1]::
+	Compares the content and mode of blobs found via two tree objects.
+
+gitlink:git-for-each-ref[1]::
+	Output information on each ref.
+
+gitlink:git-fsck-objects[1]::
+	Verifies the connectivity and validity of the objects in the database.
+
+gitlink:git-ls-files[1]::
+	Information about files in the index and the working tree.
+
+gitlink:git-ls-tree[1]::
+	Displays a tree object in human readable form.
+
+gitlink:git-merge-base[1]::
+	Finds as good common ancestors as possible for a merge.
+
+gitlink:git-name-rev[1]::
+	Find symbolic names for given revs.
+
+gitlink:git-pack-redundant[1]::
+	Find redundant pack files.
+
+gitlink:git-rev-list[1]::
+	Lists commit objects in reverse chronological order.
+
+gitlink:git-show-index[1]::
+	Displays contents of a pack idx file.
+
+gitlink:git-tar-tree[1]::
+	Creates a tar archive of the files in the named tree object.
+
+gitlink:git-unpack-file[1]::
+	Creates a temporary file with a blob's contents.
+
+gitlink:git-var[1]::
+	Displays a git logical variable.
+
+gitlink:git-verify-pack[1]::
+	Validates packed git archive files.
+
+In general, the interrogate commands do not touch the files in
+the working tree.
+
+
+Synching repositories
+~~~~~~~~~~~~~~~~~~~~~
+
+gitlink:git-fetch-pack[1]::
+	Updates from a remote repository (engine for ssh and
+	local transport).
+
+gitlink:git-http-fetch[1]::
+	Downloads a remote git repository via HTTP by walking
+	commit chain.
+
+gitlink:git-local-fetch[1]::
+	Duplicates another git repository on a local system by
+	walking commit chain.
+
+gitlink:git-peek-remote[1]::
+	Lists references on a remote repository using
+	upload-pack protocol (engine for ssh and local
+	transport).
+
+gitlink:git-receive-pack[1]::
+	Invoked by 'git-send-pack' to receive what is pushed to it.
+
+gitlink:git-send-pack[1]::
+	Pushes to a remote repository, intelligently.
+
+gitlink:git-http-push[1]::
+	Push missing objects using HTTP/DAV.
+
+gitlink:git-shell[1]::
+	Restricted shell for GIT-only SSH access.
+
+gitlink:git-ssh-fetch[1]::
+	Pulls from a remote repository over ssh connection by
+	walking commit chain.
+
+gitlink:git-ssh-upload[1]::
+	Helper "server-side" program used by git-ssh-fetch.
+
+gitlink:git-update-server-info[1]::
+	Updates auxiliary information on a dumb server to help
+	clients discover references and packs on it.
+
+gitlink:git-upload-archive[1]::
+	Invoked by 'git-archive' to send a generated archive.
+
+gitlink:git-upload-pack[1]::
+	Invoked by 'git-fetch-pack' to push
+	what are asked for.
+
+
 Configuration Mechanism
 -----------------------