Update README.md

README.md

@@ -155,12 +155,12 @@ match string {
 // ...
 ```
 
-## Potential Improvements
-### General
+### Potential Improvements
+#### General
 - Support for math in `6'4"` syntax, like `3'+2'4"`. Currently needs to be written like `3'+3'+4"`
 - The functions in units.rs have a lot of manual if statements. This could probably be replaced with a pretty advanced macro.
 - Support for lexing words, like `one billion`
-### Potential unit types
+#### Potential unit types
 Nice list of units: https://support.google.com/websearch/answer/3284611
 - Currency: How would you go about dynamically updating the weights?
 - Fuel consumption