I committed it with the changes you suggested.  

Thanks


On Thu, Mar 24, 2016 at 10:24:32PM +0100, Ricardo Wurmus wrote:
     
     Hi John,
     
     thanks for the patch!  While the patch looks generally okay, I do want
     to make a few nit-picking comments.
     
     > * gnu/packages/databses.scm (postgresql): substitute /bin/sh
     > with location of  bash binary.
                       ^
                        \_ why two spaces?
     
     >      (build-system gnu-build-system)
     > +    (arguments
     > +     `(#:phases
     > +       (modify-phases %standard-phases
     > +         (add-before
     > +          'configure 'patch-/bin/sh
     
     we usually keep these on the same line as ???add-before???.
     
     > +          (lambda* (#:key inputs #:allow-other-keys)
     > +            (let ((bash (assoc-ref inputs "bash")))
     > +              ;; Refer to the actual shell.
     > +              (substitute* '("src/bin/pg_ctl/pg_ctl.c"
     > +                             "src/bin/psql/command.c")
     > +                (("/bin/sh")
     > +                 (string-append bash "/bin/sh")))))))))
     
     I think we could just do this:
     
         (lambda _
           (substitute* '(...)
             (("/bin/sh") (which "sh")))
           #t)
     
     Also note the final ???#t??? because ???substitute*??? has an undetermined
     return value.
     
     What do you think?
     
     ~~ Ricardo
     

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