fix: don't treat backslashes in comments as escapes

src/main/java/org/codejive/properties/PropertiesParser.java

@@ -269,7 +269,8 @@ private int readChar() throws IOException {
 
     private void addChar(int ch) throws IOException {
         str.append((char) ch);
-        if (ch == '\\') {
+        // Comments have no escapes or line continuations
+        if (ch == '\\' && state != Type.COMMENT) {
             hasEscapes = true;
             int ch2 = readChar();
             str.append((char) ch2);

src/test/java/org/codejive/properties/TestProperties.java

@@ -822,6 +822,14 @@ void testPutAtInvalidPosition() throws IOException {
         assertThat(p).containsEntry("middle", "3");
     }
 
+    @Test
+    void testCommentEndingWithBackslash() throws IOException {
+        Properties p =
+                Properties.loadProperties(new StringReader("# temp dir: C:\\temp\\\nalpha=1\n"));
+
+        assertThat(p).containsEntry("alpha", "1");
+    }
+
     @Test
     void testPutNewTest2() throws IOException, URISyntaxException {
         Path f = getResource("/test2.properties");

src/test/java/org/codejive/properties/TestPropertiesParser.java

@@ -108,6 +108,21 @@ void testStringify() throws IOException {
         assertThat(props2).isEqualTo(props);
     }
 
+    @Test
+    void testBackslashesInComment() throws IOException {
+        List<Token> tokens =
+                PropertiesParser.tokens(new StringReader("# C:\\users\\\nfoo=bar"))
+                        .collect(Collectors.toList());
+
+        assertThat(tokens)
+                .containsExactly(
+                        new Token(Type.COMMENT, "# C:\\users\\"),
+                        new Token(Type.WHITESPACE, "\n"),
+                        new Token(Type.KEY, "foo"),
+                        new Token(Type.SEPARATOR, "="),
+                        new Token(Type.VALUE, "bar"));
+    }
+
     @Test
     void testEmptySeparatorAndValueAtEof() throws IOException {
         List<Token> tokens =