make(1) has commands .include <file> and .include "file", but the manpage was (inconsistently) rendering <file> with angle-brackets (e.g. in UTF8 output, ⟨file⟩ ) and "file" with curly-quotes in HTML output (but not text).
This is an attempt to fix that and output only literal <file> and "file" as is actually required in the makefile.