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.texi b/qemu-img.texi
index 6b42e35..360543b 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -87,7 +87,7 @@
 If @code{-r} is specified, qemu-img tries to repair any inconsistencies found
 during the check. @code{-r leaks} repairs only cluster leaks, whereas
 @code{-r all} fixes all kinds of errors, with a higher risk of choosing the
-wrong fix or hiding corruption that has already occured.
+wrong fix or hiding corruption that has already occurred.
 
 Only the formats @code{qcow2}, @code{qed} and @code{vdi} support
 consistency checks.