migration guides: 3.4: remove spurious space in example

Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Cc: Ross Burton <ross.burton@arm.com>
(From yocto-docs rev: 1942514a3f5c1a9719aa21c143088e00074a6480)

Signed-off-by: Johan Korsnes <johan.korsnes@remarkable.no>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Reviewed-by: Quentin Schulz <foss+yocto@0leil.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/migration-guides/migration-3.4.rst

@@ -22,7 +22,7 @@ syntax, so the following::
 
    SRC_URI_append = " file://somefile"
    SRC_URI_append_qemux86 = " file://somefile2"
-   SRC_URI_remove_qemux86-64 = " file://somefile3"
+   SRC_URI_remove_qemux86-64 = "file://somefile3"
    SRC_URI_prepend_qemuarm = "file://somefile4 "
    FILES_${PN}-ptest = "${bindir}/xyz"
    IMAGE_CMD_tar = "tar"
@@ -34,7 +34,7 @@ would now become::
 
    SRC_URI:append = " file://somefile"
    SRC_URI:append:qemux86 = " file://somefile2"
-   SRC_URI:remove:qemux86-64 = " file://somefile3"
+   SRC_URI:remove:qemux86-64 = "file://somefile3"
    SRC_URI:prepend:qemuarm = "file://somefile4 "
    FILES:${PN}-ptest = "${bindir}/xyz"
    IMAGE_CMD:tar = "tar"