test_conflicts and test_resolve_command: use indoc! to indent conflict markers in tests

Apart from (IMO) looking nicer, this will also sidestep the potential problem
that if the file contains actual jj conflict markers (`>>>>>>>` in the beginning
of a line, for example), jj would currently have trouble materializing and
subsequently parsing conflicts in the file if it actually became conflicted.

I'll demo this bug in either this or a subsequent PR. It's the kind of bug that
sounds serious in theory but might never cause a problem in practice.

After this PR, only `docs/tutorial.md` has a conflict marker that's not indented.
There's only one there, so hopefully it won't be too much of a pain to deal with.

I also indented other strings in `test_conflicts.rs`. IMO, this looks nice and
more consistent with the `insta::assert_snapshot` output. I didn't spend the
time to do the same for `test_resolve_command`.

Author: ilyagr

Cargo.lock

@@ -56,6 +56,7 @@ glob = "0.3.1"
 hex = "0.4.3"
 ignore = "0.4.20"
 indexmap = "2.2.5"
+indoc = "2.0.4"
 insta = { version = "1.35.1", features = ["filters"] }
 itertools = "0.12.1"
 libc = { version = "0.2.153" }

Cargo.toml

@@ -82,6 +82,7 @@ anyhow = { workspace = true }
 assert_cmd = { workspace = true }
 assert_matches = { workspace = true }
 async-trait = { workspace = true }
+indoc = { workspace = true }
 insta = { workspace = true }
 test-case = { workspace = true }
 testutils = { workspace = true }

cli/Cargo.toml

@@ -14,6 +14,8 @@
 
 use std::path::Path;
 
+use indoc::indoc;
+
 use crate::common::TestEnvironment;
 
 fn create_commit(
@@ -195,15 +197,16 @@ fn test_resolution() {
         &editor_script,
         [
             "dump editor2",
-            "write
-<<<<<<<
-%%%%%%%
--some
-+fake
-+++++++
-conflict
->>>>>>>
-",
+            indoc! {"
+                write
+                <<<<<<<
+                %%%%%%%
+                -some
+                +fake
+                +++++++
+                conflict
+                >>>>>>>
+            "},
         ]
         .join("\0"),
     )
@@ -270,15 +273,16 @@ conflict
         &editor_script,
         [
             "dump editor3",
-            "write
-<<<<<<<
-%%%%%%%
--some
-+fake
-+++++++
-conflict
->>>>>>>
-",
+            indoc! {"
+                write
+                <<<<<<<
+                %%%%%%%
+                -some
+                +fake
+                +++++++
+                conflict
+                >>>>>>>
+            "},
         ]
         .join("\0"),
     )

cli/tests/test_resolve_command.rs

@@ -72,6 +72,7 @@ winreg = { workspace = true }
 assert_matches = { workspace = true }
 criterion = { workspace = true }
 esl01-renderdag = { workspace = true }
+indoc = { workspace = true }
 insta = { workspace = true }
 num_cpus = { workspace = true }
 pretty_assertions = { workspace = true }