two-fer: clarify README
`Two-fer` or `2-fer` is short for two for one. One for you and one for me.
+Given a name, return a string with the message:
+
```text
-"One for X, one for me."
+One for X, one for me.
```
-When X is a name or "you".
+Where X is the given name.
+
+However, if the name is missing, return the string:
+
+```text
+One for you, one for me.
+```
-If the given name is "Alice", the result should be "One for Alice, one for me."
-If no name is given, the result should be "One for you, one for me."
+Here are some examples:
+|Name | String to return
+|:------:|:-----------------:
+|Alice | One for Alice, one for me.
+|Bob | One for Bob, one for me.
+| | One for you, one for me.
+|Zaphod | One for Zaphod, one for me.
## Rust Installation
