fix issue with unicode in SVG

apparently map projections with unicode in their names create invalid SVG when using the executable (even tho it works fine when I run the source code...).  something about the encoding I gess?  I don't really understand, but it's better to escape the map projection names anyway just to be consistent with the templates that are already escaped.  I did that and now it seems fine.

build.xml

@@ -5,7 +5,7 @@
 	<property name="dir.commons" value="C:\Program Files\Java\commons-math3-3.6.1"/>
 	<property name="dir.jre" value="C:\Program Files\Java\jre-1.8"/>
 	<property name="dir.jarfile" value="."/>
-	<property name="version" value="3.5.4"/>
+	<property name="version" value="3.5.5"/>
 	<property name="year" value="2023"/>
 	
 	<target name="setup">

src/apps/MapDesignerVector.java

@@ -56,6 +56,7 @@ import java.util.List;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
+import static image.SVGMap.escapeHTML;
 import static java.lang.Double.isNaN;
 import static java.lang.Math.hypot;
 import static java.lang.String.format;
@@ -378,7 +379,7 @@ public class MapDesignerVector extends MapApplication {
 			}
 			// for non-data Strings, replace "Equirectangular" with the name of the projection
 			else if (elementS instanceof Content) {
-				elementP = new Content(((Content) elementS).content.replace("Equirectangular", proj.getName()));
+				elementP = new Content(((Content) elementS).content.replace("Equirectangular", escapeHTML(proj.getName())));
 			}
 			// anything else doesn't need to be changed with the projection
 			else {

src/image/SVGMap.java

@@ -154,15 +154,8 @@ public class SVGMap implements Iterable<SVGMap.SVGElement>, SavableImage {
 			@Override
 			public void characters(char[] characters, int start, int length) {
 				// just dump the provided characters into currentFormatString
-				StringBuilder characterString = new StringBuilder();
-				for (int i = 0; i < length; i++) {
-					char c = characters[start + i];
-					if (c >= 128 || c == '\'' || c == '"' || c == '<' || c == '>' || c == '&') // some characters must be escaped here
-						characterString.append("&#").append((int) c).append(";");
-					else
-						characterString.append(c);
-				}
-				elements.add(new Content(characterString.toString()));
+				elements.add(new Content(escapeHTML(
+						new String(characters).substring(start, start + length))));
 			}
 			
 //			@Override  /* only available in Java 14+ */
@@ -545,6 +538,19 @@ public class SVGMap implements Iterable<SVGMap.SVGElement>, SavableImage {
 		string.append(">");
 		return string.toString();
 	}
+	
+	
+	public static String escapeHTML(String raw) {
+		StringBuilder escaped = new StringBuilder();
+		for (int i = 0; i < raw.length(); i ++) {
+			char c = raw.charAt(i);  // don't forget to escape special characters
+			if (c >= 128 || c == '\'' || c == '"' || c == '<' || c == '>' || c == '&') // some characters must be escaped here
+				escaped.append(format("&#%d;", (int) c));
+			else
+				escaped.append(c);
+		}
+		return escaped.toString();
+	}
 
 
 	/**