provider index doc: Skip headers that mention Contributing (#2507)

This pull request globalizes skipping sections whose headers mention
Contributing, in the `docs/_index.md` file.

It does so by adding Contributing/contributing to the denylist of words
found in a header in an index.md file.

Example: pulumi/pulumi-vsphere#607

pkg/tfgen/installation_docs.go

@@ -401,8 +401,9 @@ func getDefaultHeadersToSkip() []*regexp.Regexp {
 		regexp.MustCompile("[Dd]evelopment"),
 		regexp.MustCompile("[Dd]ebugging"),
 		regexp.MustCompile("[Tt]erraform CLI"),
-		regexp.MustCompile("[Tt]erraform Cloud"),
+		regexp.MustCompile("[Tt]erraform [Cc]loud"),
 		regexp.MustCompile("Delete Protection"),
+		regexp.MustCompile("[Cc]ontributing"),
 	}
 	return defaultHeaderSkipRegexps
 }

pkg/tfgen/installation_docs_test.go

@@ -2,6 +2,7 @@ package tfgen
 
 import (
 	"bytes"
+	"regexp"
 	"runtime"
 	"testing"
 
@@ -398,6 +399,94 @@ func TestSkipSectionHeadersByContent(t *testing.T) {
 	})
 }
 
+func TestSkipDefaultSectionHeaders(t *testing.T) {
+	t.Parallel()
+	type testCase struct {
+		// The name of the test case.
+		name          string
+		headersToSkip []*regexp.Regexp
+		input         string
+		expected      string
+	}
+
+	testCases := []testCase{
+		{
+			name:          "Skips Sections Mentioning Logging",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## Logging",
+			expected:      "",
+		},
+		{
+			name:          "Skips Sections Mentioning Logs",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## This section talks about logs",
+			expected:      "",
+		},
+		{
+			name:          "Skips Sections About Testing",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## Testing",
+			expected:      "",
+		},
+		{
+			name:          "Skips Sections About Development",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## Development",
+			expected:      "",
+		},
+		{
+			name:          "Skips Sections About Debugging",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## Debugging",
+			expected:      "",
+		},
+		{
+			name:          "Skips Sections Talking About Terraform CLI",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## Terraform CLI",
+			expected:      "",
+		},
+		{
+			name:          "Skips Sections Talking About terraform cloud",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "### terraform cloud",
+			expected:      "",
+		},
+		{
+			name:          "Skips Sections About Delete Protection",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "### Delete Protection",
+			expected:      "",
+		}, {
+			name:          "Skips Sections About Contributing",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## Contributing",
+			expected:      "",
+		}, {
+			name:          "Does Not Skip Sections About Unicorns",
+			headersToSkip: getDefaultHeadersToSkip(),
+			input:         "## Unicorns",
+			expected:      "## Unicorns",
+		},
+	}
+	for _, tt := range testCases {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			actual, err := SkipSectionByHeaderContent([]byte(tt.input), func(headerText string) bool {
+				for _, header := range tt.headersToSkip {
+					if header.Match([]byte(headerText)) {
+						return true
+					}
+				}
+				return false
+			})
+			require.NoError(t, err)
+			assertEqualHTML(t, tt.expected, string(actual))
+		})
+	}
+}
+
 // Helper func to determine if the HTML rendering is equal.
 // This helps in cases where the processed Markdown is slightly different from the expected Markdown
 // due to goldmark making some (insignificant to the final HTML) changes when parsing and rendering.