Comment gets duplicated

[paulrouget]

[foo]
one = 1 # a comment

edit(toml, `foo.bar`, 2);

Returns:

[foo]
one = 1 # a comment
bar = 2 # a comment

[paulrouget]

Here is a failing test:

diff --git a/tests/edit.test.ts b/tests/edit.test.ts
index 732acf3..8159b10 100644
--- a/tests/edit.test.ts
+++ b/tests/edit.test.ts
@@ -10,6 +10,11 @@ const input = dedent`
 `
 const opt = { finalNewline: false }
 
+const input_with_comment = dedent`
+    [foo]
+    one = 1 # a comment
+`
+
 describe("edit", () => {
     beforeAll(async () => {
         await init()
@@ -22,6 +27,15 @@ describe("edit", () => {
         `)
     })
 
+    it("set string with comment", () => {
+        expect(edit(input_with_comment, "foo.bar", "qux", opt)).toBe(dedent`
+            [foo]
+            one = 1 # a comment
+            bar = "qux"
+        `)
+    })
+
+
     it("set string with default finalNewline", () => {
         expect(edit(input, "foo.bar", "qux"))
             .toBe(dedent`