gir/girgen/cmt: Drop back-compat whitespace hacks

I added these in the previous commit so that the formatting would match
exactly.  Now that we've verified that there are no regressions, let's
drop them.

gir/girgen/cmt/cmt.go

@@ -262,7 +262,6 @@ func goDoc(v interface{}, indentLvl int, opts []Option) string {
 	docBuilder.Reset()
 	docBuilder.WriteString(docStr)
 
-	baseLen := docBuilder.Len()
 	if len(inf.ParamDocs) > 0 {
 		writeParamDocs(&docBuilder,
 			"\n\nThe function takes the following parameters:\n",
@@ -273,7 +272,6 @@ func goDoc(v interface{}, indentLvl int, opts []Option) string {
 			"\n\nThe function returns the following values:\n",
 			inf.ReturnDocs)
 	}
-	hasTail := docBuilder.Len() > baseLen
 
 	cmt := convertMarkdownStringToGoDoc(docBuilder.String())
 
@@ -294,7 +292,6 @@ func goDoc(v interface{}, indentLvl int, opts []Option) string {
 		// gofmt step to turn them into tabs.
 		TextPrefix: strings.Repeat(" ", CommentsTabWidth*indentLvl) + "// ",
 	}
-	printer.TextCodePrefix = printer.TextPrefix + strings.Repeat(" ", CommentsTabWidth-1)
 	cmtStr := string(printer.Text(cmt))
 	cmtStr = transformLines(cmtStr, func(n, d int, line string) string {
 		if line == "" && n+1 != d {
@@ -303,10 +300,6 @@ func goDoc(v interface{}, indentLvl int, opts []Option) string {
 		return line
 	})
 
-	if hasTail && !synopsize && !strings.HasSuffix(cmtStr, "\n//\n") {
-		cmtStr += "//\n"
-	}
-
 	if !searchOptsBool(opts, trailingNewLine{}) {
 		cmtStr = strings.TrimSuffix(cmtStr, "\n")
 	}