doc: convert merge strategies to synopsis format

- Switch the synopsis to a synopsis block which will automatically
  format placeholders in italics and keywords in monospace
- Use _<placeholder>_ instead of <placeholder> in the description
- Use `backticks` for keywords and more complex option
descriptions. The new rendering engine will apply synopsis rules to
these spans.

Signed-off-by: Jean-Noël Avila <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: jnavila

Documentation/merge-strategies.adoc

@@ -6,7 +6,7 @@ backend 'merge strategies' to be chosen with `-s` option.  Some strategies
 can also take their own options, which can be passed by giving `-X<option>`
 arguments to `git merge` and/or `git pull`.
 
-ort::
+`ort`::
 	This is the default merge strategy when pulling or merging one
 	branch.  This strategy can only resolve two heads using a
 	3-way merge algorithm.  When there is more than one common
@@ -29,26 +29,26 @@ descendant. Otherwise, Git will treat this case as a conflict, suggesting
 as a resolution a submodule commit that is descendant of the conflicting
 ones, if one exists.
 +
-The 'ort' strategy can take the following options:
+The `ort` strategy can take the following options:
 
-ours;;
+`ours`;;
 	This option forces conflicting hunks to be auto-resolved cleanly by
 	favoring 'our' version.  Changes from the other tree that do not
 	conflict with our side are reflected in the merge result.
 	For a binary file, the entire contents are taken from our side.
 +
-This should not be confused with the 'ours' merge strategy, which does not
+This should not be confused with the `ours` merge strategy, which does not
 even look at what the other tree contains at all.  It discards everything
 the other tree did, declaring 'our' history contains all that happened in it.
 
-theirs;;
-	This is the opposite of 'ours'; note that, unlike 'ours', there is
-	no 'theirs' merge strategy to confuse this merge option with.
+`theirs`;;
+	This is the opposite of `ours`; note that, unlike `ours`, there is
+	no `theirs` merge strategy to confuse this merge option with.
 
-ignore-space-change;;
-ignore-all-space;;
-ignore-space-at-eol;;
-ignore-cr-at-eol;;
+`ignore-space-change`;;
+`ignore-all-space`;;
+`ignore-space-at-eol`;;
+`ignore-cr-at-eol`;;
 	Treats lines with the indicated type of whitespace change as
 	unchanged for the sake of a three-way merge.  Whitespace
 	changes mixed with other changes to a line are not ignored.
@@ -61,89 +61,89 @@ ignore-cr-at-eol;;
   version includes a substantial change, 'their' version is used;
 * Otherwise, the merge proceeds in the usual way.
 
-renormalize;;
+`renormalize`;;
 	This runs a virtual check-out and check-in of all three stages
 	of any file which needs a three-way merge.  This option is
 	meant to be used when merging branches with different clean
 	filters or end-of-line normalization rules.  See "Merging
 	branches with differing checkin/checkout attributes" in
 	linkgit:gitattributes[5] for details.
 
-no-renormalize;;
+`no-renormalize`;;
 	Disables the `renormalize` option.  This overrides the
 	`merge.renormalize` configuration variable.
 
-find-renames[=<n>];;
+`find-renames[=<n>]`;;
 	Turn on rename detection, optionally setting the similarity
 	threshold.  This is the default. This overrides the
-	'merge.renames' configuration variable.
+	`merge.renames` configuration variable.
 	See also linkgit:git-diff[1] `--find-renames`.
 
-rename-threshold=<n>;;
+`rename-threshold=<n>`;;
 	Deprecated synonym for `find-renames=<n>`.
 
-no-renames;;
+`no-renames`;;
 	Turn off rename detection. This overrides the `merge.renames`
 	configuration variable.
 	See also linkgit:git-diff[1] `--no-renames`.
 
-histogram;;
+`histogram`;;
 	Deprecated synonym for `diff-algorithm=histogram`.
 
-patience;;
+`patience`;;
 	Deprecated synonym for `diff-algorithm=patience`.
 
-diff-algorithm=[histogram|minimal|myers|patience];;
+`diff-algorithm=(histogram|minimal|myers|patience)`;;
 	Use a different diff algorithm while merging, which can help
 	avoid mismerges that occur due to unimportant matching lines
 	(such as braces from distinct functions).  See also
 	linkgit:git-diff[1] `--diff-algorithm`.  Note that `ort`
 	defaults to `diff-algorithm=histogram`, while regular diffs
 	currently default to the `diff.algorithm` config setting.
 
-subtree[=<path>];;
+`subtree[=<path>]`;;
 	This option is a more advanced form of 'subtree' strategy, where
 	the strategy makes a guess on how two trees must be shifted to
 	match with each other when merging.  Instead, the specified path
 	is prefixed (or stripped from the beginning) to make the shape of
 	two trees to match.
 
-recursive::
+`recursive`::
 	This is now a synonym for `ort`.  It was an alternative
 	implementation until v2.49.0, but was redirected to mean `ort`
 	in v2.50.0.  The previous recursive strategy was the default
 	strategy for resolving two heads from Git v0.99.9k until
 	v2.33.0.
 
-resolve::
+`resolve`::
 	This can only resolve two heads (i.e. the current branch
 	and another branch you pulled from) using a 3-way merge
 	algorithm.  It tries to carefully detect criss-cross
 	merge ambiguities.  It does not handle renames.
 
-octopus::
+`octopus`::
 	This resolves cases with more than two heads, but refuses to do
 	a complex merge that needs manual resolution.  It is
 	primarily meant to be used for bundling topic branch
 	heads together.  This is the default merge strategy when
 	pulling or merging more than one branch.
 
-ours::
+`ours`::
 	This resolves any number of heads, but the resulting tree of the
 	merge is always that of the current branch head, effectively
 	ignoring all changes from all other branches.  It is meant to
 	be used to supersede old development history of side
-	branches.  Note that this is different from the -Xours option to
-	the 'ort' merge strategy.
+	branches.  Note that this is different from the `-Xours` option to
+	the `ort` merge strategy.
 
-subtree::
+`subtree`::
 	This is a modified `ort` strategy. When merging trees A and
 	B, if B corresponds to a subtree of A, B is first adjusted to
 	match the tree structure of A, instead of reading the trees at
 	the same level. This adjustment is also done to the common
 	ancestor tree.
 
-With the strategies that use 3-way merge (including the default, 'ort'),
+With the strategies that use 3-way merge (including the default, `ort`),
 if a change is made on both branches, but later reverted on one of the
 branches, that change will be present in the merged result; some people find
 this behavior confusing.  It occurs because only the heads and the merge base