Ruby: keep any last text wrapped in internal table elements

Some publishers include 〘 and 〙 around a <rt> so that,
when ruby is not supported, these are displayed inline and
wrap the annotation.
We'd rather have them not shown by having them wrapped and
swallowed/hidden among table-like elements.

crengine/src/lvtinydom.cpp

@@ -88,7 +88,7 @@ extern const int gDOMVersionCurrent = DOM_VERSION_CURRENT;
 
 /// change in case of incompatible changes in swap/cache file format to avoid using incompatible swap file
 // increment to force complete reload/reparsing of old file
-#define CACHE_FILE_FORMAT_VERSION "3.05.68k"
+#define CACHE_FILE_FORMAT_VERSION "3.05.69k"
 /// increment following value to force re-formatting of old book after load
 #define FORMATTING_VERSION_ID 0x002D
 
@@ -7236,7 +7236,13 @@ void ldomNode::initNodeRendMethod()
                         // We'll also not start a wrap with it.
                     }
                 }
-                if ( last_to_wrap >= 0 && (eoc || (elemId != el_rt && elemId != el_rtc && elemId != el_rp && elemId != -2) ) ) {
+                // A non-empty text node (elemId==-1) would trigger a wrap of what's before. If it happens
+                // to be the last child, keep it included in the last wrap to not have some dangling text
+                // (some publishers include 〘 and 〙 around a <rt> so that, when ruby is not supported,
+                // these are displayed inline and wrap the annotation; we'd rather have them not shown by
+                // having them wrapped and swallowed/hidden among table-like elements).
+                if ( last_to_wrap >= 0 && (eoc || (elemId != el_rt && elemId != el_rtc && elemId != el_rp &&
+                                                   elemId != -2 && !(elemId==-1 && i==len-1)) ) ) {
                     if ( false && getDocument()->hasCacheFile() ) { // (20200626: this is no longer an issue)
                         // (We can only move/add nodes while we don't yet have a cache file)
                         getDocument()->setBoxingWishedButPreventedByCache();
@@ -7269,6 +7275,9 @@ void ldomNode::initNodeRendMethod()
                     if ( first_to_wrap < 0 ) {
                         first_to_wrap = i;
                     }
+                    if ( i == len-1) { // last child: include it in the wrap (see above)
+                        last_to_wrap = i;
+                    }
                 }
                 else if ( elemId == -2 ) { // isText(), empty
                     // Don't start a wrap on it