improve comments of isEmpty()

Change-Id: I6542470c2d4b27de25e263651e25baf85c7d018d

sal/inc/rtl/strbuf.hxx

@@ -289,6 +289,19 @@ public:
         return pData->length;
     }
 
+    /**
+      Checks if a string buffer is empty.
+
+      @return   true if the string buffer is empty;
+                false, otherwise.
+
+      @since LibreOffice 4.1
+    */
+    bool isEmpty() const SAL_THROW(())
+    {
+        return pData->length == 0;
+    }
+
     /**
         Returns the current capacity of the String buffer.
 

sal/inc/rtl/string.hxx

@@ -356,8 +356,8 @@ public:
     /**
       Checks if a string is empty.
 
-      @return   sal_True if the string is empty;
-                sal_False, otherwise.
+      @return   true if the string is empty;
+                false, otherwise.
 
       @since LibreOffice 3.4
     */

sal/inc/rtl/ustrbuf.hxx

@@ -284,10 +284,10 @@ public:
     /**
       Checks if a string buffer is empty.
 
-      @return   sal_True if the string buffer is empty;
-                sal_False, otherwise.
+      @return   true if the string buffer is empty;
+                false, otherwise.
 
-      @since LibreOffice 4.0
+      @since LibreOffice 4.1
     */
     bool isEmpty() const SAL_THROW(())
     {

sal/inc/rtl/ustring.hxx

@@ -446,8 +446,8 @@ public:
     /**
       Checks if a string is empty.
 
-      @return   sal_True if the string is empty;
-                sal_False, otherwise.
+      @return   true if the string is empty;
+                false, otherwise.
 
       @since LibreOffice 3.4
     */