Fix typos and use more idiomatic assertions (#7755)

I have changed `assert!(a == b)` calls to `assert_eq!(a, b)`, which give
better error messages. Similarly for `assert!(a != b)` and
`assert_ne!(a, b)`. Basically all instances were comparing primitives
(string slices or integers), so there is no loss of generality from
special-case macros,

I have also fixed a number of typos in comments, variable names, and a
few user-facing messages.

crates/nu-glob/src/lib.rs

@@ -921,21 +921,21 @@ mod test {
     #[test]
     fn test_pattern_from_str() {
         assert!("a*b".parse::<Pattern>().unwrap().matches("a_b"));
-        assert!("a/**b".parse::<Pattern>().unwrap_err().pos == 4);
+        assert_eq!("a/**b".parse::<Pattern>().unwrap_err().pos, 4);
     }
 
     #[test]
     fn test_wildcard_errors() {
-        assert!(Pattern::new("a/**b").unwrap_err().pos == 4);
-        assert!(Pattern::new("a/bc**").unwrap_err().pos == 3);
-        assert!(Pattern::new("a/*****").unwrap_err().pos == 4);
-        assert!(Pattern::new("a/b**c**d").unwrap_err().pos == 2);
-        assert!(Pattern::new("a**b").unwrap_err().pos == 0);
+        assert_eq!(Pattern::new("a/**b").unwrap_err().pos, 4);
+        assert_eq!(Pattern::new("a/bc**").unwrap_err().pos, 3);
+        assert_eq!(Pattern::new("a/*****").unwrap_err().pos, 4);
+        assert_eq!(Pattern::new("a/b**c**d").unwrap_err().pos, 2);
+        assert_eq!(Pattern::new("a**b").unwrap_err().pos, 0);
     }
 
     #[test]
     fn test_glob_errors() {
-        assert!(glob("a/**b").err().unwrap().pos == 4);
+        assert_eq!(glob("a/**b").err().unwrap().pos, 4);
     }
 
     // this test assumes that there is a /root directory and that