diff --git a/commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/internal/FootnoteHtmlNodeRenderer.java b/commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/internal/FootnoteHtmlNodeRenderer.java
index 72c3792b1..70eb048a3 100644
--- a/commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/internal/FootnoteHtmlNodeRenderer.java
+++ b/commonmark-ext-footnotes/src/main/java/org/commonmark/ext/footnotes/internal/FootnoteHtmlNodeRenderer.java
@@ -267,7 +267,7 @@ private void renderBackrefs(Node def, ReferencedDefinition referencedDefinition)
                 html.tag("/sup");
             }
             // U+21A9 LEFTWARDS ARROW WITH HOOK
-            html.raw("↩");
+            html.raw("\u21A9");
             html.tag("/a");
             if (i + 1 < refs.size()) {
                 html.raw(" ");
diff --git a/commonmark/src/main/java/org/commonmark/internal/HeadingParser.java b/commonmark/src/main/java/org/commonmark/internal/HeadingParser.java
index d422c1241..3bc9ba5c4 100644
--- a/commonmark/src/main/java/org/commonmark/internal/HeadingParser.java
+++ b/commonmark/src/main/java/org/commonmark/internal/HeadingParser.java
@@ -69,7 +69,7 @@ public BlockStart tryStart(ParserState state, MatchedBlockParser matchedBlockPar
     }
 
     // spec: An ATX heading consists of a string of characters, parsed as inline content, between an opening sequence of
-    // 1–6 unescaped # characters and an optional closing sequence of any number of unescaped # characters. The opening
+    // 1-6 unescaped # characters and an optional closing sequence of any number of unescaped # characters. The opening
     // sequence of # characters must be followed by a space or by the end of line. The optional closing sequence of #s
     // must be preceded by a space and may be followed by spaces only.
     private static HeadingParser getAtxHeading(SourceLine line) {
@@ -140,10 +140,12 @@ private static int getSetextHeadingLevel(CharSequence line, int index) {
                 if (isSetextHeadingRest(line, index + 1, '=')) {
                     return 1;
                 }
+                break;
             case '-':
                 if (isSetextHeadingRest(line, index + 1, '-')) {
                     return 2;
                 }
+                break;
         }
         return 0;
     }
diff --git a/commonmark/src/main/java/org/commonmark/internal/ListBlockParser.java b/commonmark/src/main/java/org/commonmark/internal/ListBlockParser.java
index d77744da7..fbf034757 100644
--- a/commonmark/src/main/java/org/commonmark/internal/ListBlockParser.java
+++ b/commonmark/src/main/java/org/commonmark/internal/ListBlockParser.java
@@ -128,7 +128,7 @@ private static ListMarkerData parseListMarker(CharSequence line, int index) {
         }
     }
 
-    // spec: An ordered list marker is a sequence of 1–9 arabic digits (0-9), followed by either a `.` character or a
+    // spec: An ordered list marker is a sequence of 1-9 arabic digits (0-9), followed by either a `.` character or a
     // `)` character.
     private static ListMarkerData parseOrderedList(CharSequence line, int index) {
         int digits = 0;
diff --git a/commonmark/src/main/java/org/commonmark/internal/util/Escaping.java b/commonmark/src/main/java/org/commonmark/internal/util/Escaping.java
index 27f59ebf7..d928b6f43 100644
--- a/commonmark/src/main/java/org/commonmark/internal/util/Escaping.java
+++ b/commonmark/src/main/java/org/commonmark/internal/util/Escaping.java
@@ -115,11 +115,11 @@ public static String percentEncodeUrl(String s) {
     public static String normalizeLabelContent(String input) {
         String trimmed = input.trim();
 
-        // This is necessary to correctly case fold "ẞ" to "SS":
-        // "ẞ".toLowerCase(Locale.ROOT)  -> "ß"
-        // "ß".toUpperCase(Locale.ROOT)  -> "SS"
+        // This is necessary to correctly case fold "\u1E9E" (LATIN CAPITAL LETTER SHARP S) to "SS":
+        // "\u1E9E".toLowerCase(Locale.ROOT)  -> "\u00DF" (LATIN SMALL LETTER SHARP S)
+        // "\u00DF".toUpperCase(Locale.ROOT)  -> "SS"
         // Note that doing upper first (or only upper without lower) wouldn't work because:
-        // "ẞ".toUpperCase(Locale.ROOT)  -> "ẞ"
+        // "\u1E9E".toUpperCase(Locale.ROOT)  -> "\u1E9E"
         String caseFolded = trimmed.toLowerCase(Locale.ROOT).toUpperCase(Locale.ROOT);
 
         return WHITESPACE.matcher(caseFolded).replaceAll(" ");
diff --git a/commonmark/src/main/java/org/commonmark/internal/util/Html5Entities.java b/commonmark/src/main/java/org/commonmark/internal/util/Html5Entities.java
index 523c596ed..8da53c053 100644
--- a/commonmark/src/main/java/org/commonmark/internal/util/Html5Entities.java
+++ b/commonmark/src/main/java/org/commonmark/internal/util/Html5Entities.java
@@ -12,7 +12,7 @@
 public class Html5Entities {
 
     private static final Map<String, String> NAMED_CHARACTER_REFERENCES = readEntities();
-    private static final String ENTITY_PATH = "/org/commonmark/internal/util/entities.properties";
+    private static final String ENTITY_PATH = "/org/commonmark/internal/util/entities.txt";
 
     public static String entityToString(String input) {
         if (!input.startsWith("&") || !input.endsWith(";")) {
diff --git a/commonmark/src/main/java/org/commonmark/renderer/text/CoreTextContentNodeRenderer.java b/commonmark/src/main/java/org/commonmark/renderer/text/CoreTextContentNodeRenderer.java
index 6dcc9d1eb..865533804 100644
--- a/commonmark/src/main/java/org/commonmark/renderer/text/CoreTextContentNodeRenderer.java
+++ b/commonmark/src/main/java/org/commonmark/renderer/text/CoreTextContentNodeRenderer.java
@@ -62,9 +62,11 @@ public void visit(Document document) {
 
     @Override
     public void visit(BlockQuote blockQuote) {
-        textContent.write('«');
+        // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
+        textContent.write('\u00AB');
         visitChildren(blockQuote);
-        textContent.write('»');
+        // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
+        textContent.write('\u00BB');
 
         writeEndOfLineIfNeeded(blockQuote, null);
     }
diff --git a/commonmark/src/main/resources/org/commonmark/internal/util/entities.properties b/commonmark/src/main/resources/org/commonmark/internal/util/entities.txt
similarity index 100%
rename from commonmark/src/main/resources/org/commonmark/internal/util/entities.properties
rename to commonmark/src/main/resources/org/commonmark/internal/util/entities.txt