doc: document --recurse-submodules for reset and restore

Also unify the formulation about --no-recurse-submodules for checkout
and switch, which we reuse for restore.

And correct the formulation about submodules' HEAD in read-tree, which
we reuse in reset.

Signed-off-by: Damien Robert <damien.olivier.robert+git@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-checkout.txt

@@ -296,7 +296,7 @@ Note that this option uses the no overlay mode by default (see also
 	submodules according to the commit recorded in the superproject. If
 	local modifications in a submodule would be overwritten the checkout
 	will fail unless `-f` is used. If nothing (or `--no-recurse-submodules`)
-	is used, the work trees of submodules will not be updated.
+	is used, submodules working trees will not be updated.
 	Just like linkgit:git-submodule[1], this will detach `HEAD` of the
 	submodule.
 

Documentation/git-read-tree.txt

@@ -118,7 +118,7 @@ OPTIONS
 --[no-]recurse-submodules::
 	Using --recurse-submodules will update the content of all initialized
 	submodules according to the commit recorded in the superproject by
-	calling read-tree recursively, also setting the submodules HEAD to be
+	calling read-tree recursively, also setting the submodules' HEAD to be
 	detached at that commit.
 
 --no-sparse-checkout::

Documentation/git-reset.txt

@@ -87,6 +87,12 @@ but carries forward unmerged index entries.
 	different between `<commit>` and `HEAD`.
 	If a file that is different between `<commit>` and `HEAD` has local
 	changes, reset is aborted.
+
+--[no-]recurse-submodules::
+	When the working tree is updated, using --recurse-submodules will
+	also recursively reset the working tree of all active submodules
+	according to the commit recorded in the superproject, also setting
+	the submodules' HEAD to be detached at that commit.
 --
 
 See "Reset, restore and revert" in linkgit:git[1] for the differences

Documentation/git-restore.txt

@@ -107,6 +107,17 @@ in linkgit:git-checkout[1] for details.
 	patterns and unconditionally restores any files in
 	`<pathspec>`.
 
+--recurse-submodules::
+--no-recurse-submodules::
+	If `<pathspec>` names an active submodule and the restore location
+	includes the working tree, the submodule will only be updated if
+	this option is given, in which case its working tree will be
+	restored to the commit recorded in the superproject, and any local
+	modifications overwritten. If nothing (or
+	`--no-recurse-submodules`) is used, submodules working trees will
+	not be updated. Just like linkgit:git-checkout[1], this will detach
+	`HEAD` of the submodule.
+
 --overlay::
 --no-overlay::
 	In overlay mode, the command never removes files when

Documentation/git-switch.txt

@@ -183,7 +183,7 @@ name, the guessing is aborted.  You can explicitly give a name with
 	Using `--recurse-submodules` will update the content of all
 	initialized submodules according to the commit recorded in the
 	superproject. If nothing (or `--no-recurse-submodules`) is
-	used, the work trees of submodules will not be updated. Just
+	used, submodules working trees will not be updated. Just
 	like linkgit:git-submodule[1], this will detach `HEAD` of the
 	submodules.