Fix duplicated words in documentation

Only did instances where two-and-two words are duplicated,
easy to see when wrong.

Task-number: QTBUG-107777
Pick-to: 6.4
Change-Id: I11593728acc386e7ef9aba9b39a0a4d9c60a532f
Reviewed-by: Ievgenii Meshcheriakov <ievgenii.meshcheriakov@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

src/corelib/global/qrandom.cpp

@@ -647,7 +647,7 @@ inline QRandomGenerator::SystemGenerator &QRandomGenerator::SystemGenerator::sel
     \fn bool operator==(const QRandomGenerator &rng1, const QRandomGenerator &rng2)
     \relates QRandomGenerator
 
-    Returns true if the two the two engines \a rng1 and \a rng2 are at the same
+    Returns true if the two engines \a rng1 and \a rng2 are at the same
     state or if they are both reading from the operating system facilities,
     false otherwise.
 */
@@ -655,7 +655,7 @@ inline QRandomGenerator::SystemGenerator &QRandomGenerator::SystemGenerator::sel
 /*!
     \fn bool QRandomGenerator::operator!=(const QRandomGenerator &rng1, const QRandomGenerator &rng2)
 
-    Returns \c true if the two the two engines \a rng1 and \a rng2 are at
+    Returns \c true if the two engines \a rng1 and \a rng2 are at
     different states or if one of them is reading from the operating system
     facilities and the other is not, \c false otherwise.
 */

src/corelib/serialization/qcborcommon.cpp

@@ -198,7 +198,7 @@ QDataStream &operator>>(QDataStream &ds, QCborSimpleType &st)
    \value UnexpectedBreak   The CBOR stream contains a Break where it is not allowed (data is
                             corrupt and the error is not recoverable).
    \value UnknownType       The CBOR stream contains an unknown/unparsable Type (data is corrupt
-                            and the and the error is not recoverable).
+                            and the error is not recoverable).
    \value IllegalType       The CBOR stream contains a known type in a position it is not allowed
                             to exist (data is corrupt and the error is not recoverable).
    \value IllegalNumber     The CBOR stream appears to be encoding a number larger than 64-bit

src/gui/kernel/qevent.cpp

@@ -2075,7 +2075,7 @@ QContextMenuEvent::QContextMenuEvent(Reason reason, const QPoint &pos)
     has to be inserted to the widgets text directly before the preedit
     string.
 
-    If the commitString() should replace parts of the of the text in
+    If the commitString() should replace parts of the text in
     the editor, replacementLength() will contain the number of
     characters to be replaced. replacementStart() contains the position
     at which characters are to be replaced relative from the start of
@@ -2241,7 +2241,7 @@ Q_IMPL_EVENT_COMMON(QInputMethodEvent)
     result of the input operations and has to be inserted to the
     widgets text directly before the preedit string.
 
-    If the commit string should replace parts of the of the text in
+    If the commit string should replace parts of the text in
     the editor, \a replaceLength specifies the number of
     characters to be replaced. \a replaceFrom specifies the position
     at which characters are to be replaced relative from the start of

src/network/ssl/qsslserver.cpp

@@ -32,7 +32,7 @@
     nextPendingConnection() function to fetch the next incoming connection and
     take it out of the pending connection queue. The QSslSocket is a child of
     the QSslServer and will be deleted when the QSslServer is deleted. It is
-    still a good a good idea to destroy the object explicitly when you are done
+    still a good idea to destroy the object explicitly when you are done
     with it, to avoid wasting memory.
 
     \sa QTcpServer, QSslConfiguration, QSslSocket