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/README.md

@@ -75,7 +75,7 @@ rule.
 The example input code block must not be empty and must contain at least one error.
 
 When you don't want to update the output by this script, put the comment as follows. This script
-will ignore the code block. Instead you need to write the output in the code blcok manually.
+will ignore the code block. Instead you need to write the output in the code block manually.
 
 ```yaml
 Output:

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) }}"