Use pretty_assertions in the root crate (#8818)

# Description

This PR is just a minor development improvement. While working on
another feature, I noticed that the root crate lists the super useful
`pretty_assertions` in the root crate but doesn't use it in most tests.
With this change `pretty_assertions::assert_eq!` is used instead of
`core::assert_eq!` for better diffs when debugging the tests.

I thought of adding the dependency to other crates but I decided not to
since I didn't want a huge disruptive PR :)

src/tests/test_config_path.rs

@@ -1,4 +1,5 @@
 use nu_test_support::nu;
+use pretty_assertions::assert_eq;
 use std::fs;
 use std::path::Path;
 

src/tests/test_custom_commands.rs

@@ -1,5 +1,6 @@
 use crate::tests::{fail_test, run_test, run_test_contains, TestResult};
 use nu_test_support::nu;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn no_scope_leak1() -> TestResult {

tests/const_/mod.rs

@@ -1,4 +1,5 @@
 use nu_test_support::{nu, pipeline};
+use pretty_assertions::assert_eq;
 
 #[test]
 fn const_bool() {

tests/hooks/mod.rs

@@ -1,4 +1,5 @@
 use nu_test_support::{nu, nu_repl_code};
+use pretty_assertions::assert_eq;
 
 fn env_change_hook_code_list(name: &str, code_list: &[&str]) -> String {
     let mut list = String::new();

tests/modules/mod.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::playground::Playground;
 use nu_test_support::{nu, pipeline};
+use pretty_assertions::assert_eq;
 
 #[test]
 fn module_private_import_decl() {

tests/overlays/mod.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::playground::Playground;
 use nu_test_support::{nu, nu_repl_code, pipeline};
+use pretty_assertions::assert_eq;
 
 #[test]
 fn add_overlay() {

tests/parsing/mod.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::playground::Playground;
 use nu_test_support::{nu, pipeline};
+use pretty_assertions::assert_eq;
 
 #[test]
 fn source_file_relative_to_file() {

tests/path/canonicalize.rs

@@ -1,9 +1,8 @@
-use std::path::Path;
-
+use nu_path::canonicalize_with;
 use nu_test_support::fs::Stub::EmptyFile;
 use nu_test_support::playground::Playground;
-
-use nu_path::canonicalize_with;
+use pretty_assertions::assert_eq;
+use std::path::Path;
 
 #[test]
 fn canonicalize_path() {

tests/path/expand_path.rs

@@ -1,8 +1,7 @@
-use std::path::PathBuf;
-
-use nu_test_support::playground::Playground;
-
 use nu_path::expand_path_with;
+use nu_test_support::playground::Playground;
+use pretty_assertions::assert_eq;
+use std::path::PathBuf;
 
 #[cfg(not(windows))]
 #[test]

tests/plugins/core_inc.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContent;
 use nu_test_support::nu_with_plugins;
 use nu_test_support::playground::Playground;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn chooses_highest_increment_if_given_more_than_one() {

tests/plugins/custom_values.rs

@@ -1,4 +1,5 @@
 use nu_test_support::nu_with_plugins;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn can_get_custom_value_from_plugin_and_instantly_collapse_it() {

tests/plugins/formats/eml.rs

@@ -1,4 +1,5 @@
 use nu_test_support::nu_with_plugins;
+use pretty_assertions::assert_eq;
 
 const TEST_CWD: &str = "tests/fixtures/formats";
 

tests/plugins/formats/ics.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::nu_with_plugins;
 use nu_test_support::playground::Playground;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn infers_types() {

tests/plugins/formats/ini.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::nu_with_plugins;
 use nu_test_support::playground::Playground;
+use pretty_assertions::assert_eq;
 
 const TEST_CWD: &str = "tests/fixtures/formats";
 

tests/plugins/formats/vcf.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::nu_with_plugins;
 use nu_test_support::playground::Playground;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn infers_types() {

tests/scope/mod.rs

@@ -1,4 +1,5 @@
 use nu_test_support::nu;
+use pretty_assertions::assert_eq;
 
 #[ignore = "TODO: This shows old-style aliases. New aliases are under commands"]
 #[test]

tests/shell/environment/env.rs

@@ -4,7 +4,7 @@ use nu_test_support::fs::Stub::FileWithContent;
 use nu_test_support::nu;
 use nu_test_support::playground::Playground;
 use nu_test_support::{nu_repl_code, pipeline};
-
+use pretty_assertions::assert_eq;
 use serial_test::serial;
 
 #[test]

tests/shell/environment/nu_env.rs

@@ -3,6 +3,7 @@ use super::support::Trusted;
 use nu_test_support::fs::Stub::FileWithContent;
 use nu_test_support::playground::Playground;
 use nu_test_support::{nu, pipeline};
+use pretty_assertions::assert_eq;
 
 use serial_test::serial;
 

tests/shell/mod.rs

@@ -1,6 +1,7 @@
 use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::playground::Playground;
 use nu_test_support::{nu, nu_repl_code, pipeline};
+use pretty_assertions::assert_eq;
 
 #[cfg(feature = "which-support")]
 mod environment;

tests/shell/pipeline/commands/external.rs

@@ -1,4 +1,5 @@
 use nu_test_support::nu;
+use pretty_assertions::assert_eq;
 
 #[cfg(feature = "which-support")]
 #[test]

tests/shell/pipeline/commands/internal.rs

@@ -2,6 +2,7 @@ use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
 use nu_test_support::nu;
 use nu_test_support::pipeline;
 use nu_test_support::playground::Playground;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn takes_rows_of_nu_value_strings_and_pipes_it_to_stdin_of_external() {

tests/shell/pipeline/mod.rs

@@ -1,6 +1,7 @@
 mod commands;
 
 use nu_test_support::nu;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn doesnt_break_on_utf8() {