Various minor edits for clarity

Author: ravicodelabs

src/error/multiple_error_types/reenter_question_mark.md

@@ -26,7 +26,7 @@ Here, we rewrite the previous example using `?`. As a result, the
 use std::error;
 use std::fmt;
 
-// Change the alias to `Box<dyn error::Error>`.
+// Change the alias to use `Box<dyn error::Error>`.
 type Result<T> = std::result::Result<T, Box<dyn error::Error>>;
 
 #[derive(Debug)]

src/macros/dsl.md

@@ -12,7 +12,7 @@ an expression and have the output printed to console.
 macro_rules! calculate {
     (eval $e:expr) => {
         {
-            let val: usize = $e; // Force types to be integers
+            let val: usize = $e; // Force types to be unsigned integers
             println!("{} = {}", stringify!{$e}, val);
         }
     };

src/trait/disambiguating.md

@@ -1,8 +1,8 @@
 # Disambiguating overlapping traits
 
 A type can implement many different traits. What if two traits both require
-the same name? For example, many traits might have a method named `get()`.
-They might even have different return types!
+the same name for a function? For example, many traits might have a method 
+named `get()`. They might even have different return types!
 
 Good news: because each trait implementation gets its own `impl` block, it's
 clear which trait's `get` method you're implementing.