build-lexical-var vs. -Wunused-variable

[Ludovic Courtès]

Hello,

Commit f9685f437312ea790981373ddc375b2a26ba9c4f changes
‘build-lexical-var’ like this:

     (define-syntax-rule (build-lexical-var src id)
-      (gensym (string-append (symbol->string id) " ")))
+      (gensym (string-append (symbol->string id) "-")))

This breaks a heuristic used in the ‘unused-variable’ pass, which is
that identifiers containing white space are likely introduced by a macro
and can be ignored in unused-variable reports (see ‘gensym?’ in
‘tree-il/analyze.scm’).

OK to change it back?

Thanks,
Ludo’.