[Typo] Plurals

essentials/on-unicode/index.md

@@ -4,17 +4,17 @@ title: Notes on using Unicode
 
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-Raku assumes that all your program files are saved as UTF-8 files. From the practical point of view, that means that you don’t have to worry about non-ASCII characters in, for example, string literals. But that’s not only that. You most likely will not need to worry if your program reads a text file that is also a UTF-8 file. It also means that string length is correctly detected as the number of characters and not the number of bytes. (We will have a more detailed look into it later.) 
+Raku assumes that all your program files are saved as UTF-8 files. From a practical point of view, that means that you don’t have to worry about non-ASCII characters in, for example, string literals. But that’s not only that. You most likely will not need to worry if your program reads a text file that is also a UTF-8 file. It also means that string length is correctly detected as the number of characters and not the number of bytes. (We will have a more detailed look into it later.) 
 
 The next thing you want to know is that you can use non-Latin or non-English letters for identifiers. You can name your variable `$ι` instead of `$i` if you prefer, and the compiler will parse it correctly.
 
-Raku treats the Unicode properties of the characters pedantically enough. For example, it not only knows if a character is a letter or a digit, but also correctly identifies pair characters such as parentheses or different kind of brackets. In many cases, you can choose a different type of brackets for separate parts of the program. For instance, you can modify our ‘Hello, World!’ program to use these non-Latin quoting characters (you will see them again when we’ll work with Raku grammars):
+Raku treats the Unicode properties of the characters pedantically enough. For example, it not only knows if a character is a letter or a digit, but also correctly identifies pair characters such as parentheses or different kinds of brackets. In many cases, you can choose a different type of bracket for separate parts of the program. For instance, you can modify our ‘Hello, World!’ program to use these non-Latin quoting characters (you will see them again when we’ll work with Raku grammars):
 
 ```raku
 say ｢Hello, World!｣;
 ```
 
-Some built-in operators have two forms: a Unicode and an ASCII versions. For example, one can type a negated comparison as `!=` or as `≠`. The same applies to set operations: for instance, `∈` has a pure ASCII equivalent `(elem)`. Or, there is a built-in constant which you can refer to as `pi` or `π`.
+Some built-in operators have two forms: a Unicode and an ASCII version. For example, one can type a negated comparison as `!=` or as `≠`. The same applies to set operations: for instance, `∈` has a pure ASCII equivalent `(elem)`. Or, there is a built-in constant which you can refer to as `pi` or `π`.
 
 When working with numbers, you can choose to use fractions in the form of `½` instead of `0.5`. Or, evaluating the square of `$x` as `$x²` using a superscript character.