Complete text about salsa base inputs

Author: spastorino

src/salsa.md

@@ -32,7 +32,8 @@ see its type), completions, etc.
 
 ## How does it work?
 
-The first thing that Salsa has to do is identify the "base inputs" [^EN1].
+The first thing that Salsa has to do is identify the "base inputs" that
+are not something computed but given as input.
 
 Then Salsa has to also identify intermediate, "derived" values, which are
 something that the library produces, but, for each derived value there's a
@@ -107,7 +108,7 @@ potentially invalidated.
 
 A query group is a set of queries which have been defined together as a unit.
 The database is formed by combining query groups.  Query groups are akin to
-"Salsa modules" [^EN2].
+"Salsa modules" [^EN1].
 
 A set of queries in a query group are just a set of methods in a trait.
 
@@ -212,6 +213,4 @@ fn main() {
 }
 ```
 
-[^EN1]: "They are not something that you **inaubible** but something that you kinda get **inaudible** from the outside [3:23](https://youtu.be/_muY4HjSqVw?t=203).
-
-[^EN2]: What is a Salsa module?
+[^EN1]: What is a Salsa module?