A few more tests to reduce risk of regressions (dart-lang/yaml_edit#77)

pkgs/yaml_edit/test/testdata/input/remove_block_list.test

diff --git a/pkgs/yaml_edit/test/testdata/input/remove_block_list.test b/pkgs/yaml_edit/test/testdata/input/remove_block_list.test
new file mode 100644
index 0000000..cf61522
--- /dev/null
+++ b/pkgs/yaml_edit/test/testdata/input/remove_block_list.test
@@ -0,0 +1,14 @@
+REMOVE FROM LIST IN BLOCK MODE
+---
+ - true
+ - test:
+ - foo: true
+   bar:
+ - baz:
+ - nested:
+     foo:
+---
+ - [remove, [1, 'test']]
+ - [remove, [2, 'bar']]
+ - [remove, [3, 'baz']]
+ - [remove, [4, 'nested', 'foo']]

pkgs/yaml_edit/test/testdata/input/remove_flow_map.test

diff --git a/pkgs/yaml_edit/test/testdata/input/remove_flow_map.test b/pkgs/yaml_edit/test/testdata/input/remove_flow_map.test
new file mode 100644
index 0000000..6bbf7ab
--- /dev/null
+++ b/pkgs/yaml_edit/test/testdata/input/remove_flow_map.test
@@ -0,0 +1,44 @@
+REMOVE FROM MAP IN FLOW MODE
+---
+A: true
+B: {foo:  }
+C: {
+  foo:,bar:true
+}
+D: {
+  foo:
+  ,bar:true
+}
+E: {
+  foo: # comment
+  ,bar:true
+}
+F: {
+  # comment
+  foo:
+  ,bar:true
+}
+G: {
+  # comment
+  foo:
+  # comment
+  ,bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+- [remove, [B, foo]]
+- [remove, [C, foo]]
+- [remove, [D, foo]]
+- [remove, [E, foo]]
+- [remove, [F, foo]]
+- [remove, [G, foo]]
+- [remove, [H, foo]]
+- [remove, [I, foo]]
+- [remove, [J, foo]]

pkgs/yaml_edit/test/testdata/output/remove_block_list.golden

diff --git a/pkgs/yaml_edit/test/testdata/output/remove_block_list.golden b/pkgs/yaml_edit/test/testdata/output/remove_block_list.golden
new file mode 100644
index 0000000..7aa3880
--- /dev/null
+++ b/pkgs/yaml_edit/test/testdata/output/remove_block_list.golden
@@ -0,0 +1,36 @@
+ - true
+ - test:
+ - foo: true
+   bar:
+ - baz:
+ - nested:
+     foo:
+---
+ - true
+ - {}
+ - foo: true
+   bar:
+ - baz:
+ - nested:
+     foo:
+---
+ - true
+ - {}
+ - foo: true
+ - baz:
+ - nested:
+     foo:
+---
+ - true
+ - {}
+ - foo: true
+ - {}
+ - nested:
+     foo:
+---
+ - true
+ - {}
+ - foo: true
+ - {}
+ - nested:
+     {}

pkgs/yaml_edit/test/testdata/output/remove_flow_map.golden

diff --git a/pkgs/yaml_edit/test/testdata/output/remove_flow_map.golden b/pkgs/yaml_edit/test/testdata/output/remove_flow_map.golden
new file mode 100644
index 0000000..690dcab
--- /dev/null
+++ b/pkgs/yaml_edit/test/testdata/output/remove_flow_map.golden
@@ -0,0 +1,258 @@
+A: true
+B: {foo:  }
+C: {
+  foo:,bar:true
+}
+D: {
+  foo:
+  ,bar:true
+}
+E: {
+  foo: # comment
+  ,bar:true
+}
+F: {
+  # comment
+  foo:
+  ,bar:true
+}
+G: {
+  # comment
+  foo:
+  # comment
+  ,bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {
+  foo:,bar:true
+}
+D: {
+  foo:
+  ,bar:true
+}
+E: {
+  foo: # comment
+  ,bar:true
+}
+F: {
+  # comment
+  foo:
+  ,bar:true
+}
+G: {
+  # comment
+  foo:
+  # comment
+  ,bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {
+  foo:
+  ,bar:true
+}
+E: {
+  foo: # comment
+  ,bar:true
+}
+F: {
+  # comment
+  foo:
+  ,bar:true
+}
+G: {
+  # comment
+  foo:
+  # comment
+  ,bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {bar:true
+}
+E: {
+  foo: # comment
+  ,bar:true
+}
+F: {
+  # comment
+  foo:
+  ,bar:true
+}
+G: {
+  # comment
+  foo:
+  # comment
+  ,bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {bar:true
+}
+E: {bar:true
+}
+F: {
+  # comment
+  foo:
+  ,bar:true
+}
+G: {
+  # comment
+  foo:
+  # comment
+  ,bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {bar:true
+}
+E: {bar:true
+}
+F: {bar:true
+}
+G: {
+  # comment
+  foo:
+  # comment
+  ,bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {bar:true
+}
+E: {bar:true
+}
+F: {bar:true
+}
+G: {bar:true
+}
+H: {
+  foo: # comment
+  ,
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {bar:true
+}
+E: {bar:true
+}
+F: {bar:true
+}
+G: {bar:true
+}
+H: {
+  bar:true
+}
+I: {
+  bar: true, foo: }
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {bar:true
+}
+E: {bar:true
+}
+F: {bar:true
+}
+G: {bar:true
+}
+H: {
+  bar:true
+}
+I: {
+  bar: true}
+J: {  foo   :  }
+---
+A: true
+B: {}
+C: {bar:true
+}
+D: {bar:true
+}
+E: {bar:true
+}
+F: {bar:true
+}
+G: {bar:true
+}
+H: {
+  bar:true
+}
+I: {
+  bar: true}
+J: {}