Fix function comments based on best practices from Effective Go

Signed-off-by: CodeLingo Bot <bot@codelingo.io>

latex.go

@@ -39,7 +39,7 @@ func (options *Latex) GetFlags() int {
 	return 0
 }
 
-// render code chunks using verbatim, or listings if we have a language
+// BlockCode renders code chunks using verbatim, or listings if we have a language
 func (options *Latex) BlockCode(out *bytes.Buffer, text []byte, info string) {
 	if info == "" {
 		out.WriteString("\n\\begin{verbatim}\n")
@@ -299,7 +299,7 @@ func (options *Latex) NormalText(out *bytes.Buffer, text []byte) {
 	escapeSpecialChars(out, text)
 }
 
-// header and footer
+// DocumentHeader: header and footer
 func (options *Latex) DocumentHeader(out *bytes.Buffer) {
 	out.WriteString("\\documentclass{article}\n")
 	out.WriteString("\n")

markdown.go

@@ -306,7 +306,7 @@ func MarkdownBasic(input []byte) []byte {
 	return MarkdownOptions(input, renderer, Options{Extensions: 0})
 }
 
-// Call Markdown with most useful extensions enabled
+// MarkdownCommon: Call Markdown with most useful extensions enabled
 // MarkdownCommon is a convenience function for simple rendering.
 // It processes markdown input with common extensions enabled, including:
 //