Doc: Fixed random QDoc warnings

- Fixed \snippet paths
- Minor language edits
- Removed unnecessary multiple page commands in a single comment
block. For example, \fn and \qmlsignal in a single comment block
is not allowed. Such instances must be documented in separate
comment blocks.

Change-Id: I65f4518499e2600c4e1807356d4116c575e48c19
Reviewed-by: Andy Nichols <andy.nichols@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

src/multimedia/audio/qsound.cpp

@@ -47,7 +47,7 @@
 /*!
     \class QSound
     \brief The QSound class provides a method to play .wav sound files.
-
+    \inmodule QtMultimedia
     \ingroup multimedia
     \ingroup multimedia_audio
 
@@ -55,12 +55,12 @@
     applications: asynchronously playing a sound file. This is most
     easily accomplished using the static play() function:
 
-    \snippet doc/src/snippets/multimedia-snippets/qsound.cpp 0
+    \snippet multimedia-snippets/qsound.cpp 0
 
     Alternatively, create a QSound object from the sound file first
     and then call the play() slot:
 
-    \snippet doc/src/snippets/multimedia-snippets/qsound.cpp 1
+    \snippet multimedia-snippets/qsound.cpp 1
 
     Once created a QSound object can be queried for its fileName() and
     total number of loops() (i.e. the number of times the sound will