Some YALO warnings are duplicated

[NathanReb]

I noticed some warnings appear twice, for example, warning YALO 14:

File "src/oui_lib/info_plist.ml", lines 74-77, characters 4-29
Warning (YALO+14): (a ^ b ^ c) should be replaced by Printf.sprintf "%s%s%s" a b c

00072   let to_xml (plist : t) =
00073     let header =
00074 >     "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" ^
00075 >     "<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" " ^
00076 >     "\"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" ^
00077 >     "<plist version=\"1.0\">"
            ^^^^^^^^^^^^^^^^^^^^^^^^^
00078     in
00079     let content = value_to_xml_element "" (Dict plist) in
00080     let footer = "</plist>" in

File "src/oui_lib/info_plist.ml", lines 75-77, characters 4-29
Warning (YALO+14): (a ^ b ^ c) should be replaced by Printf.sprintf "%s%s%s" a b c

00073     let header =
00074       "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" ^
00075 >     "<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" " ^
00076 >     "\"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" ^
00077 >     "<plist version=\"1.0\">"
            ^^^^^^^^^^^^^^^^^^^^^^^^^
00078     in
00079     let content = value_to_xml_element "" (Dict plist) in
00080     let footer = "</plist>" in

or YALO 17:

File "src/oui_lib/opam_frontend.ml", line 40, characters 6-7
Warning (YALO+17): "( expr ; expr )" is misleading because "(" should not hide a side-effects

00038       try Wix.Version.of_string pkg_version
00039       with Failure _ ->
00040 >       (OpamConsole.warning
              ^
00041            "Package version %s contains characters not accepted by MSI."
00042            (OpamConsole.colorise `underline pkg_version);
00043          let use = "use config file to set it or option --with-version" in

File "src/oui_lib/opam_frontend.ml", line 40, characters 6-7
Warning (YALO+17): "( expr ; expr )" is misleading because "(" should not hide a side-effects

00038       try Wix.Version.of_string pkg_version
00039       with Failure _ ->
00040 >       (OpamConsole.warning
              ^
00041            "Package version %s contains characters not accepted by MSI."
00042            (OpamConsole.colorise `underline pkg_version);
00043          let use = "use config file to set it or option --with-version" in

I suspect this is in fact a problem with the driver running the lint on both the source file and the preprocessed version in dune projects.