Fix links in plural words.

In some documents, "{QObject}s" was used which didn't show up as link. This is
fixed by using "\l{QObject}s" instead.

Change-Id: I90dbd543790842b242a11f3f94a32d4273ebb38d
Reviewed-by: Martin Smith <martin.smith@digia.com>

src/corelib/doc/src/animation.qdoc

@@ -48,7 +48,7 @@
 
     The animation framework aims to provide an easy way for creating animated
     and smooth GUIs. By animating Qt properties, the framework provides great
-    freedom for animating widgets and other {QObject}s. The framework can
+    freedom for animating widgets and other \l{QObject}s. The framework can
     also be used with the Graphics View framework. Many of the concepts
     available in the animation framework are also available in \l{Qt Quick},
     where it offers a declarative way of defining animations. Much of the
@@ -57,7 +57,7 @@
 
     In this overview, we explain the basics of its architecture. We
     also show examples of the most common techniques that the
-    framework allows for animating {QObject}s and graphics items.
+    framework allows for animating \l{QObject}s and graphics items.
 
     \tableofcontents
 
@@ -85,7 +85,7 @@
     over the property using an easing curve. So when you want to
     animate a value, you can declare it as a property and make your
     class a QObject. Note that this gives us great freedom in
-    animating already existing widgets and other {QObject}s.
+    animating already existing widgets and other \l{QObject}s.
 
     Complex animations can be constructed by building a tree structure
     of \l{QAbstractAnimation}s. The tree is built by using

src/corelib/doc/src/filestorage.qdoc

@@ -87,7 +87,7 @@ There are three general ways to use QTextStream when reading text files:
 
 \list
     \li Chunk by chunk, by calling \l{QBuffer::readLine()}{readLine()} or \l{QBuffer::readAll()}{readAll()}.
-    \li Word by word. QTextStream supports streaming into {QString}s, {QByteArray}s
+    \li Word by word. QTextStream supports streaming into \l{QString}s, \l{QByteArray}s
         and char* buffers. Words are delimited by space, and leading white space
         is automatically skipped.
     \li Character by character, by streaming into QChar or char types. This

src/corelib/tools/qbytearray.cpp

@@ -726,7 +726,7 @@ static inline char qToLower(char c)
     occurrences of a particular value with another, use one of the
     two-parameter replace() overloads.
 
-    {QByteArray}s can be compared using overloaded operators such as
+    \l{QByteArray}s can be compared using overloaded operators such as
     operator<(), operator<=(), operator==(), operator>=(), and so on.
     The comparison is based exclusively on the numeric values
     of the characters and is very fast, but is not what a human would
@@ -771,7 +771,7 @@ static inline char qToLower(char c)
     lastIndexOf(), operator<(), operator<=(), operator>(),
     operator>=(), toLower() and toUpper().
 
-    This issue does not apply to {QString}s since they represent
+    This issue does not apply to \l{QString}s since they represent
     characters using Unicode.
 
     \sa QString, QBitArray