Spelling fixes in comments and documentation

These wrong spellings were detected by codespell:

* successully -> successfully

* alot -> a lot

* wanna -> want to

* infomation -> information

* occured -> occurred

["also is" -> "is also" and "ressources" -> "resources" suggested by
Peter Maydell <peter.maydell@linaro.org>]

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/qemu-img.c b/qemu-img.c
index b41e670..833b2b0 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -89,7 +89,7 @@
            "  '-r' tries to repair any inconsistencies that are found during the check.\n"
            "       '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
            "       kinds of errors, with a higher risk of choosing the wrong fix or\n"
-           "       hiding corruption that has already occured.\n"
+           "       hiding corruption that has already occurred.\n"
            "\n"
            "Parameters to snapshot subcommand:\n"
            "  'snapshot' is the name of the snapshot to create, apply or delete\n"