readme: link directly to package doc section

README.md

@@ -2,35 +2,31 @@
 
 Checks exhaustiveness of enum switch statements in Go source code.
 
+```
+go install github.com/nishanths/exhaustive/cmd/exhaustive@latest
+```
+
 The repository consists of an importable Go package and a command line
 program. The package provides an `analysis.Analyzer` value that follows
 the guidelines in the [`golang.org/x/tools/go/analysis`][xanalysis]
-package. This should make it possible to integrate exhaustive with your
+package. This should make it possible to integrate `exhaustive` with your
 own analysis driver programs.
 
-To install the command line program, run:
-
-```
-go install github.com/nishanths/exhaustive/cmd/exhaustive@latest
-```
-
-For documentation on the command's flags, definition of enums, and
-definition of exhaustiveness, see [pkg.go.dev][godoc]. For a changelog,
-see [CHANGELOG][changelog] in the wiki.
+For documentation on flags, the definition of enum, and the definition
+of exhaustiveness, see [pkg.go.dev][godoc-doc]. For a changelog, see
+[CHANGELOG][changelog] in the wiki.
 
 The program may additionally be configured to check for exhaustiveness
 of map literals with enum key types. See examples below.
 
 ## Bugs
 
-`exhaustive` does not report missing cases for a switch statement that
-switch on a type-parameterized type. For details see [this
-issue][issue-typeparam].
+`exhaustive` does not report missing cases in a switch statement that
+switches on a type-parameterized type. See [this issue][issue-typeparam]
+for details.
 
 ## Examples
 
-### Switch statement
-
 Given the enum
 
 ```go
@@ -54,7 +50,7 @@ package calc
 
 import "token"
 
-func doSomething(t token.Token) {
+func f(t token.Token) {
 	switch t {
 	case token.Add:
 	case token.Subtract:
@@ -63,41 +59,39 @@ func doSomething(t token.Token) {
 	}
 }
 
-var tokenNames = map[token.Token]string{
+var m = map[token.Token]string{
 	token.Add:      "add",
 	token.Subtract: "subtract",
 	token.Multiply: "multiply",
 }
 ```
 
-running exhaustive with default options will print:
+running `exhaustive` with default options will print
 
 ```
 % exhaustive path/to/pkg/calc
 calc.go:6:2: missing cases in switch of type token.Token: Quotient, Remainder
 %
 ```
 
-### Map literal
-
-To additionally check exhaustiveness of map literals, use the `-check`
-flag.
+To additionally check exhaustiveness of map literals, use
+`-check=switch,map`.
 
 ```
 % exhaustive -check=switch,map path/to/pkg/calc
 calc.go:6:2: missing cases in switch of type token.Token: Quotient, Remainder
-calc.go:14:18: missing keys in map of key type token.Token: Quotient, Remainder
+calc.go:14:9: missing keys in map of key type token.Token: Quotient, Remainder
 %
 ```
 
 ## Contributing
 
 Issues and pull requests are welcome. Before making a substantial
-change, please discuss it in an issue.
+change please discuss it in an issue.
 
 [repo]: https://pkg.go.dev/github.com/nishanths/exhaustive
 [godoc-svg]: https://pkg.go.dev/badge/github.com/nishanths/exhaustive.svg
-[godoc]: https://pkg.go.dev/github.com/nishanths/exhaustive
+[godoc-doc]: https://pkg.go.dev/github.com/nishanths/exhaustive#section-documentation
 [xanalysis]: https://pkg.go.dev/golang.org/x/tools/go/analysis
 [changelog]: https://github.com/nishanths/exhaustive/wiki/CHANGELOG
 [issue-typeparam]: https://github.com/nishanths/exhaustive/issues/31