Fix double words and article mismatches in docs.

interface/wx/propgrid/property.h

@@ -1016,7 +1016,7 @@ public:
         @param value
             Int to get the value from.
         @param flags
-            If has ::wxPG_FULL_VALUE, then the value given is a actual value and not an index.
+            If has ::wxPG_FULL_VALUE, then the value given is an actual value and not an index.
 
         @return @true if value was changed.
     */
@@ -2784,7 +2784,7 @@ public:
     void EnsureData();
 
     /**
-        Gets a unsigned number identifying this list.
+        Gets an unsigned number identifying this list.
     */
     wxPGChoicesId GetId() const;
 

interface/wx/propgrid/propgrid.h

@@ -1243,7 +1243,7 @@ public:
     bool IsEditorsValueModified() const;
 
     /**
-        Shows an brief error message that is related to a property.
+        Shows a brief error message that is related to a property.
     */
     void ShowPropertyError( wxPGPropArg id, const wxString& msg );
 

interface/wx/propgrid/propgridiface.h

@@ -851,7 +851,7 @@ public:
                                 const wxString& falseChoice );
 
     /**
-        Set proportion of a auto-stretchable column. wxPG_SPLITTER_AUTO_CENTER
+        Set proportion of an auto-stretchable column. wxPG_SPLITTER_AUTO_CENTER
         window style needs to be used to indicate that columns are auto-
         resizable.
 
@@ -1062,7 +1062,7 @@ public:
         @param maxLen
             Maximum number of characters of the text the user can enter in
             the text editor. If it is 0, the length is not limited and the text
-            can be as long as it is supported by the the underlying native text
+            can be as long as it is supported by the underlying native text
             control widget.
         @return
             Returns @true if maximum length was set.

interface/wx/propgrid/props.h

@@ -441,7 +441,7 @@ protected:
     wxEnumProperty with wxString value and writable combo box editor.
 
     @remarks
-    Uses int value, similar to wxEnumProperty, unless text entered by user is
+    Uses int value, similar to wxEnumProperty, unless text entered by user
     is not in choices (in which case string value is used).
 */
 class wxEditEnumProperty : public wxEnumProperty