fix typos in document, tests, and file names

Author: rhysd

docs/checks.md

@@ -2846,7 +2846,7 @@ action_metadata_syntax_validation.yaml:8:15: "env" is not allowed in "runs" sect
 
 <!-- Skip playground link -->
 
-All actions require a metadata file `action.yml` or `aciton.yaml`. The syntax is defined in [the official document][action-metadata-doc].
+All actions require a metadata file `action.yml` or `action.yaml`. The syntax is defined in [the official document][action-metadata-doc].
 
 actionlint checks metadata files used in workflows and reports errors when they are not following the syntax.
 

scripts/check-checks/main_test.go

@@ -34,7 +34,7 @@ func testErr(t *testing.T, err error, want ...string) {
 	msg := err.Error()
 	for _, w := range want {
 		if !strings.Contains(msg, w) {
-			t.Errorf("error message %q does not cotnain expected text %q", msg, w)
+			t.Errorf("error message %q does not contain expected text %q", msg, w)
 		}
 	}
 }

testdata/examples/contexts_and_buitin_funcs.out renamed to testdata/examples/contexts_and_builtin_funcs.out

@@ -16,5 +16,5 @@ jobs:
       # Function overloads can be handled properly. contains() has string version and array version
       - run: echo "${{ contains('hello, world', 'lo,') }}"
       - run: echo "${{ contains(github.event.labels.*.name, 'enhancement') }}"
-      # format() has a special check for formating string
+      # format() has a special check for formatting string
       - run: echo "${{ format('{0}{1}', 1, 2, 3) }}"