fix clippy beta lints (exercism#1262)

* fix clippy beta lints

* fix accidental changes to test semantics

exercises/concept/magazine-cutout/.docs/instructions.md

@@ -22,7 +22,7 @@ Given the following input
 ```rust
 let magazine = "two times three is not four".split_whitespace().collect::<Vec<&str>>();
 let note = "two times two is four".split_whitespace().collect::<Vec<&str>>();
-assert_eq!(can_construct_note(&magazine, &note), false);
+assert!(!can_construct_note(&magazine, &note));
 ```
 
 The function returns `false` since the magazine only contains one instance of `"two"` when the note requires two of them.

exercises/concept/magazine-cutout/tests/magazine-cutout.rs

@@ -8,7 +8,7 @@ fn test_example_works() {
     let note = "two times two is four"
         .split_whitespace()
         .collect::<Vec<&str>>();
-    assert_eq!(can_construct_note(&magazine, &note), false);
+    assert!(!can_construct_note(&magazine, &note));
 }
 
 #[test]
@@ -18,7 +18,7 @@ fn test_fn_returns_true_for_good_input() {
     let note = "give one grand today."
         .split_whitespace()
         .collect::<Vec<&str>>();
-    assert_eq!(can_construct_note(&magazine, &note), true);
+    assert!(can_construct_note(&magazine, &note));
 }
 
 #[test]
@@ -30,7 +30,7 @@ fn test_fn_returns_false_for_bad_input() {
     let note = "I've got som coconuts"
         .split_whitespace()
         .collect::<Vec<&str>>();
-    assert_eq!(can_construct_note(&magazine, &note), false);
+    assert!(!can_construct_note(&magazine, &note));
 }
 
 #[test]
@@ -42,13 +42,13 @@ fn test_case_sensitivity() {
     let note = "I've got some coconuts"
         .split_whitespace()
         .collect::<Vec<&str>>();
-    assert_eq!(can_construct_note(&magazine, &note), false);
+    assert!(!can_construct_note(&magazine, &note));
 
     let magazine = "I've got some lovely coconuts"
         .split_whitespace()
         .collect::<Vec<&str>>();
     let note = "i've got some coconuts"
         .split_whitespace()
         .collect::<Vec<&str>>();
-    assert_eq!(can_construct_note(&magazine, &note), false);
+    assert!(!can_construct_note(&magazine, &note));
 }

exercises/practice/isogram/tests/isogram.rs

@@ -2,81 +2,74 @@ use isogram::check;
 
 #[test]
 fn empty_string() {
-    assert_eq!(check(""), true, "An empty string should be an isogram.")
+    assert!(check(""), "An empty string should be an isogram.")
 }
 
 #[test]
 #[ignore]
 fn only_lower_case_characters() {
-    assert_eq!(check("isogram"), true, "\"isogram\" should be an isogram.")
+    assert!(check("isogram"), "\"isogram\" should be an isogram.")
 }
 
 #[test]
 #[ignore]
 fn one_duplicated_character() {
-    assert_eq!(
-        check("eleven"),
-        false,
+    assert!(
+        !check("eleven"),
         "\"eleven\" has more than one \'e\', therefore it is no isogram."
     )
 }
 
 #[test]
 #[ignore]
 fn longest_reported_english_isogram() {
-    assert_eq!(
+    assert!(
         check("subdermatoglyphic"),
-        true,
         "\"subdermatoglyphic\" should be an isogram."
     )
 }
 
 #[test]
 #[ignore]
 fn one_duplicated_character_mixed_case() {
-    assert_eq!(
-        check("Alphabet"),
-        false,
+    assert!(
+        !check("Alphabet"),
         "\"Alphabet\" has more than one \'a\', therefore it is no isogram."
     )
 }
 
 #[test]
 #[ignore]
 fn hypothetical_isogramic_word_with_hyphen() {
-    assert_eq!(
+    assert!(
         check("thumbscrew-japingly"),
-        true,
         "\"thumbscrew-japingly\" should be an isogram."
     )
 }
 
 #[test]
 #[ignore]
 fn isogram_with_duplicated_hyphen() {
-    assert_eq!(
+    assert!(
         check("six-year-old"),
-        true,
         "\"six-year-old\" should be an isogram."
     )
 }
 
 #[test]
 #[ignore]
 fn made_up_name_that_is_an_isogram() {
-    assert_eq!(
+    assert!(
         check("Emily Jung Schwartzkopf"),
-        true,
         "\"Emily Jung Schwartzkopf\" should be an isogram."
     )
 }
 
 #[test]
 #[ignore]
 fn duplicated_character_in_the_middle() {
-    assert_eq!(
-        check("accentor"),
-        false,
+    assert!(
+        !check("accentor"),
         "\"accentor\" has more than one \'c\', therefore it is no isogram."
     )
 }