Fix spelling and punctuation errors in comments and documentation

Fix several occurrences of misspelling "trivial" as "trival"; use "from"
rather than "than"; add missing articles and commas.

Closes https://github.com/wxWidgets/wxWidgets/pull/874

interface/wx/dynarray.h

@@ -670,9 +670,9 @@ public:
     This macro declares a new object array class named @a name and containing
     the elements of type @e T.
 
-    An exported array is used when compiling wxWidgets as a DLL under Windows
-    and the array needs to be visible outside the DLL. An user exported array
-    needed for exporting an array from a user DLL.
+    An exported array is used when compiling wxWidgets as a DLL under Windows,
+    and the array needs to be visible outside the DLL. A user-exported array
+    is needed for exporting an array from a user DLL.
 
     Example:
 
@@ -681,8 +681,8 @@ public:
     WX_DECLARE_OBJARRAY(MyClass, wxArrayOfMyClass); // note: not "MyClass *"!
     @endcode
 
-    You must use WX_DEFINE_OBJARRAY() macro to define the array class,
-    otherwise you would get link errors.
+    You must use the WX_DEFINE_OBJARRAY() macro to define the array class;
+    otherwise, you will get link errors.
 */
 #define WX_DECLARE_OBJARRAY(T, name)
 #define WX_DECLARE_EXPORTED_OBJARRAY(T, name)
@@ -695,8 +695,8 @@ public:
     elements of type @a T.
 
     An exported array is used when compiling wxWidgets as a DLL under Windows
-    and the array needs to be visible outside the DLL. An user exported array
-    needed for exporting an array from a user DLL.
+    and the array needs to be visible outside the DLL. A user-exported array
+    is needed for exporting an array from a user DLL.
 
     Example:
 
@@ -728,8 +728,8 @@ public:
     destructor will not be called.
 
     An exported array is used when compiling wxWidgets as a DLL under Windows
-    and the array needs to be visible outside the DLL. An user exported array
-    needed for exporting an array from a user DLL.
+    and the array needs to be visible outside the DLL. A user-exported array
+    is needed for exporting an array from a user DLL.
 
     Example of usage:
 
@@ -760,8 +760,8 @@ public:
     the elements of type @e T.
 
     An exported array is used when compiling wxWidgets as a DLL under Windows
-    and the array needs to be visible outside the DLL. An user exported array
-    needed for exporting an array from a user DLL.
+    and the array needs to be visible outside the DLL. A user-exported array
+    is needed for exporting an array from a user DLL.
 
     Example:
 

interface/wx/font.h

@@ -749,7 +749,7 @@ public:
         Returns @true if the font is a fixed width (or monospaced) font,
         @false if it is a proportional one or font is invalid.
 
-        Note that this function under some platforms is different than just testing
+        Note that this function under some platforms is different from just testing
         for the font family being equal to @c wxFONTFAMILY_TELETYPE because native
         platform-specific functions are used for the check (resulting in a more
         accurate return value).

interface/wx/grid.h

@@ -4645,7 +4645,7 @@ protected:
     /**
         Get the minimal width of the given column/row.
 
-        The value returned by this function may be different than that returned
+        The value returned by this function may be different from that returned
         by GetColMinimalAcceptableWidth() if SetColMinimalWidth() had been
         called for this column.
     */
@@ -4664,7 +4664,7 @@ protected:
     /**
         Returns the minimal size for the given column.
 
-        The value returned by this function may be different than that returned
+        The value returned by this function may be different from that returned
         by GetRowMinimalAcceptableHeight() if SetRowMinimalHeight() had been
         called for this row.
     */

interface/wx/hashmap.h

@@ -86,7 +86,7 @@
                          wxIntegerEqual,
                          MyHash );
 
-    // using an user-defined class for keys
+    // using a user-defined class for keys
     class MyKey { ... };
 
     // hashing function

interface/wx/hashset.h

@@ -73,7 +73,7 @@
                             wxIntegerEqual,
                             MySet );
 
-        // using an user-defined class for keys
+        // using a user-defined class for keys
         class MyKey { ... };
 
         // hashing function

interface/wx/html/htmlwin.h

@@ -143,7 +143,7 @@ public:
     @event{EVT_HTML_CELL_HOVER(id, func)}
         The mouse passed over a wxHtmlCell.
     @event{EVT_HTML_LINK_CLICKED(id, func)}
-        A wxHtmlCell which contains an hyperlink was clicked.
+        A wxHtmlCell which contains a hyperlink was clicked.
     @endEventTable
 
     @library{wxhtml}
@@ -555,7 +555,7 @@ wxEventType wxEVT_HTML_LINK_CLICKED;
 
     @beginEventTable{wxHtmlLinkEvent}
     @event{EVT_HTML_LINK_CLICKED(id, func)}
-        User clicked on an hyperlink.
+        User clicked on a hyperlink.
     @endEventTable
 
     @library{wxhtml}

interface/wx/htmllbox.h

@@ -10,7 +10,7 @@
 
     wxHtmlListBox is an implementation of wxVListBox which shows HTML content in
     the listbox rows. This is still an abstract base class and you will need to
-    derive your own class from it (see htlbox sample for the example) but you will
+    derive your own class from it (see htlbox sample for the example), but you will
     only need to override a single wxHtmlListBox::OnGetItem function.
 
     @beginEventEmissionTable{wxHtmlCellEvent,wxHtmlLinkEvent}
@@ -19,7 +19,7 @@
     @event{EVT_HTML_CELL_HOVER(id, func)}
         The mouse passed over a wxHtmlCell.
     @event{EVT_HTML_LINK_CLICKED(id, func)}
-        A wxHtmlCell which contains an hyperlink was clicked.
+        A wxHtmlCell which contains a hyperlink was clicked.
     @endEventTable
 
     @library{wxhtml}
@@ -191,7 +191,7 @@ protected:
     @event{EVT_HTML_CELL_HOVER(id, func)}
         The mouse passed over a wxHtmlCell. See wxHtmlCellEvent.
     @event{EVT_HTML_LINK_CLICKED(id, func)}
-        A wxHtmlCell which contains an hyperlink was clicked. See wxHtmlLinkEvent
+        A wxHtmlCell which contains a hyperlink was clicked. See wxHtmlLinkEvent
     @endEventTable
 
     @library{wxhtml}

interface/wx/hyperlink.h

@@ -18,7 +18,7 @@
 
     @beginEventTable{wxHyperlinkEvent}
     @event{EVT_HYPERLINK(id, func)}
-        User clicked on an hyperlink.
+        User clicked on a hyperlink.
     @endEventTable
 
     @library{wxadv}

interface/wx/image.h

@@ -245,7 +245,7 @@ public:
     wxBitmapType GetType() const;
 
     /**
-        Loads a image from a stream, putting the resulting data into @a image.
+        Loads an image from a stream, putting the resulting data into @a image.
 
         If the image file contains more than one image and the image handler is
         capable of retrieving these individually, @a index indicates which image
@@ -269,7 +269,7 @@ public:
                           bool verbose = true, int index = -1);
 
     /**
-        Saves a image in the output stream.
+        Saves an image in the output stream.
 
         @param image
             The image object which is to be affected by this operation.

interface/wx/systhemectrl.h

@@ -59,7 +59,7 @@ template <class C>
 class wxSystemThemedControl : public C
 {
 public:
-    /// Trival default constructor.
+    /// Trivial default constructor.
     wxSystemThemedControl();
 
     /**

interface/wx/timectrl.h

@@ -150,11 +150,11 @@ public:
         The date part of @a dt is ignored, only the time part is displayed in
         the control. The @a dt object must however be valid.
 
-        In particular notice that it is a bad idea to use default wxDateTime
+        In particular, notice that it is a bad idea to use default wxDateTime
         constructor from hour, minute and second values as it uses the today
-        date for the date part which means that some times can be invalid if
+        date for the date part, which means that some values can be invalid if
         today happens to be the day of DST change. For example, when switching
-        to summer time the time 2:00 typically doesn't exist as the clocks jump
+        to summer time, the time 2:00 typically doesn't exist as the clocks jump
         directly to 3:00. To avoid this problem, use a fixed date on which DST
         is known not to change (e.g. Jan 1, 2012) for the date part of the
         argument or use SetTime().

interface/wx/zipstrm.h

@@ -598,11 +598,11 @@ public:
         Set the format of the archive.
 
         The normal zip format is limited to single files and the complete
-        archive smaller than 4GB with less then 65k files. If any of these
+        archive smaller than 4GB with less than 65k files. If any of these
         limits are exceeded, this class will automatically create a ZIP64 file,
         so in most situations calling SetFormat() is not necessary.
 
-        However to support single entries with more than 4GB of data
+        However, to support single entries with more than 4GB of data
         (compressed or original) whose sizes are unknown when adding the
         entry with PutNextEntry(), the format has to be set to
         wxZIP_FORMAT_ZIP64 before adding such entries.