Tidy knot CLI tests (#15685)

Author: MichaReiser

.gitignore

@@ -29,6 +29,10 @@ tracing.folded
 tracing-flamechart.svg
 tracing-flamegraph.svg
 
+# insta
+.rs.pending-snap
+
+
 ###
 # Rust.gitignore
 ###

Cargo.lock

@@ -33,6 +33,7 @@ tracing-tree = { workspace = true }
 
 [dev-dependencies]
 ruff_db = { workspace = true, features = ["testing"] }
+ruff_python_trivia = { workspace = true }
 
 insta = { workspace = true, features = ["filters"] }
 insta-cmd = { workspace = true }