capture: Fix docs around non-panicking group queries

Previously in the regex::bytes implementation docs, we missed all of the
non-panicking versions that were supposed to be demonstrated. These now
show the correct versions.

In the str implementation, the indexed capture group examples were
correct, but not the named group examples. That's now also fixed.

src/re_bytes.rs

@@ -209,9 +209,9 @@ impl Regex {
     /// let re = Regex::new(r"'([^']+)'\s+\((\d{4})\)").unwrap();
     /// let text = b"Not my favorite movie: 'Citizen Kane' (1941).";
     /// let caps = re.captures(text).unwrap();
-    /// assert_eq!(&caps[1], &b"Citizen Kane"[..]);
-    /// assert_eq!(&caps[2], &b"1941"[..]);
-    /// assert_eq!(&caps[0], &b"'Citizen Kane' (1941)"[..]);
+    /// assert_eq!(caps.get(1).unwrap().as_bytes(), &b"Citizen Kane"[..]);
+    /// assert_eq!(caps.get(2).unwrap().as_bytes(), &b"1941"[..]);
+    /// assert_eq!(caps.get(0).unwrap().as_bytes(), &b"'Citizen Kane' (1941)"[..]);
     /// // You can also access the groups by index using the Index notation.
     /// // Note that this will panic on an invalid index.
     /// assert_eq!(&caps[1], b"Citizen Kane");
@@ -232,9 +232,9 @@ impl Regex {
     ///                .unwrap();
     /// let text = b"Not my favorite movie: 'Citizen Kane' (1941).";
     /// let caps = re.captures(text).unwrap();
-    /// assert_eq!(&caps["title"], &b"Citizen Kane"[..]);
-    /// assert_eq!(&caps["year"], &b"1941"[..]);
-    /// assert_eq!(&caps[0], &b"'Citizen Kane' (1941)"[..]);
+    /// assert_eq!(caps.name("title").unwrap().as_bytes(), b"Citizen Kane");
+    /// assert_eq!(caps.name("year").unwrap().as_bytes(), b"1941");
+    /// assert_eq!(caps.get(0).unwrap().as_bytes(), &b"'Citizen Kane' (1941)"[..]);
     /// // You can also access the groups by name using the Index notation.
     /// // Note that this will panic on an invalid group name.
     /// assert_eq!(&caps["title"], b"Citizen Kane");

src/re_unicode.rs

@@ -289,8 +289,8 @@ impl Regex {
     ///                .unwrap();
     /// let text = "Not my favorite movie: 'Citizen Kane' (1941).";
     /// let caps = re.captures(text).unwrap();
-    /// assert_eq!(&caps["title"], "Citizen Kane");
-    /// assert_eq!(&caps["year"], "1941");
+    /// assert_eq!(caps.name("title").unwrap().as_str(), "Citizen Kane");
+    /// assert_eq!(caps.name("year").unwrap().as_str(), "1941");
     /// assert_eq!(caps.get(0).unwrap().as_str(), "'Citizen Kane' (1941)");
     /// // You can also access the groups by name using the Index notation.
     /// // Note that this will panic on an invalid group name.