Fix: remove unnecessary r#"..."# (#8670) (#9764)

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# Description
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This PR is related to **Tests: clean up unnecessary use of cwd,
pipeline(), etc.
[#8670](https://github.com/nushell/nushell/issues/8670)**

- Removed the `r#"..."#` raw string literal syntax, which is unnecessary
when there are no special characters that need quoting from the tests
that use the `nu!` macro.
- `cwd:` and `pipeline()` has not changed


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crates/nu-command/tests/commands/where_.rs

@@ -81,65 +81,65 @@ fn where_uses_enumerate_index() {
 fn binary_operator_comparisons() {
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
-        r#"
+        "
             open sample.db
             | get ints
             | first 4
             | where z > 4200
             | get z.0
-        "#
+        "
     ));
 
     assert_eq!(actual.out, "4253");
 
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
-        r#"
+        "
             open sample.db
             | get ints
             | first 4
             | where z >= 4253
             | get z.0
-        "#
+        "
     ));
 
     assert_eq!(actual.out, "4253");
 
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
-        r#"
+        "
             open sample.db
             | get ints
             | first 4
             | where z < 10
             | get z.0
-        "#
+        "
     ));
 
     assert_eq!(actual.out, "1");
 
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
-        r#"
+        "
             open sample.db
             | get ints
             | first 4
             | where z <= 1
             | get z.0
-        "#
+        "
     ));
 
     assert_eq!(actual.out, "1");
 
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
-        r#"
+        "
             open sample.db
             | get ints
             | where z != 1
             | first
             | get z
-        "#
+        "
     ));
 
     assert_eq!(actual.out, "42");
@@ -150,24 +150,24 @@ fn binary_operator_comparisons() {
 fn contains_operator() {
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
-        r#"
+        "
             open sample.db
             | get strings
             | where x =~ ell
             | length
-        "#
+        "
     ));
 
     assert_eq!(actual.out, "4");
 
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
-        r#"
+        "
             open sample.db
             | get strings
             | where x !~ ell
             | length
-        "#
+        "
     ));
 
     assert_eq!(actual.out, "2");