log: enable synthetic elided nodes by default

We're early in the release cycle, so let's enable this feature and
test it for a while before the next release.

CHANGELOG.md

@@ -20,6 +20,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Graph node symbols are now configurable via `ui.graph.default_node` and `ui.graph.elided_node`.
 
+* `jj log` now includes synthetic nodes in the graph where some revisions were
+  elided.
+
 * `jj squash` now accepts `--from` and `--into` (mutually exclusive with `-r`).
   It can thereby be for all use cases where `jj move` can be used.
 

cli/src/commands/log.rs

@@ -32,6 +32,9 @@ use crate::ui::Ui;
 /// Renders a graphical view of the project's history, ordered with children
 /// before parents. By default, the output only includes mutable revisions,
 /// along with some additional revisions for context.
+///
+/// Spans of revisions that are not included in the graph per `--revisions` are
+/// rendered as a synthetic node labeled "(elided revisions)".
 #[derive(clap::Args, Clone, Debug)]
 pub(crate) struct LogArgs {
     /// Which revisions to show. Defaults to the `revsets.log` setting, or

cli/src/config-schema.json

@@ -141,7 +141,7 @@
                 "log-synthetic-elided-nodes": {
                     "type": "boolean",
                     "description": "Whether to render elided parts of the graph as synthetic nodes.",
-                    "default": false
+                    "default": true
                 },
                 "editor": {
                     "type": "string",

cli/src/config/misc.toml

@@ -14,7 +14,7 @@ diff-instructions = true
 paginate = "auto"
 pager = { command = ["less", "-FRX"], env = { LESSCHARSET = "utf-8" } }
 log-word-wrap = false
-log-synthetic-elided-nodes = false
+log-synthetic-elided-nodes = true
 
 [snapshot]
 max-new-file-size = "1MiB"

cli/tests/cli-reference@.md.snap

@@ -1014,6 +1014,8 @@ Show revision history
 
 Renders a graphical view of the project's history, ordered with children before parents. By default, the output only includes mutable revisions, along with some additional revisions for context.
 
+Spans of revisions that are not included in the graph per `--revisions` are rendered as a synthetic node labeled "(elided revisions)".
+
 **Usage:** `jj log [OPTIONS] [PATHS]...`
 
 ###### **Arguments:**

cli/tests/test_log_command.rs

@@ -1356,6 +1356,7 @@ fn test_elided() {
 
     // Elide some commits from each side of the merge. It's unclear that a revision
     // was skipped on the left side.
+    test_env.add_config("ui.log-synthetic-elided-nodes = false");
     insta::assert_snapshot!(get_log("@ | @- | description(initial)"), @r###"
     @    merge
     ├─╮