Prevents prefix stripper from eating empty new lines

src/modelFactory/markdownPrefixStripper.ts

@@ -31,14 +31,14 @@ export class MarkdownPrefixStripper {
         let remaining = line;
 
         // Layer 1: Blockquote markers (always strip - unambiguous Markdown syntax)
-        const bqMatch = remaining.match(/^(\s*(?:>\s*)+)/);
+        const bqMatch = remaining.match(/^([^\S\r\n]*(?:>[^\S\r\n]*)+)/);
         if (bqMatch) {
             prefix += bqMatch[1];
             remaining = remaining.substring(bqMatch[1].length);
         }
 
         // Layer 2: List markers (only strip when followed by whitespace + |, i.e., bordered tables)
-        const listMatch = remaining.match(/^(\s*(?:\d+[.)]|[-*+]))(?=\s+\|)/);
+        const listMatch = remaining.match(/^([^\S\r\n]*(?:\d+[.)]|[-*+]))(?=[^\S\r\n]+\|)/);
         if (listMatch) {
             prefix += listMatch[1];
         }

test/systemTests/cliPrettyfierSystemTests.test.ts

@@ -28,7 +28,14 @@ fs.readdir(path.resolve(__dirname, "resources/"), function(err, files) {
         for (let fileNameRoot of distinctTests) {
             test(`[${fileNameRoot}]`, () => {
                 const input = readFileContents(`${fileNameRoot}-input.md`);
-                assert.throws(() => CliPrettify.check(input));
+                const expected = readFileContents(`${fileNameRoot}-expected.md`);
+                const cliOptions = SystemTestsConfig.getCliOptionsFor(fileNameRoot);
+
+                if (input === expected) {
+                    assert.doesNotThrow(() => CliPrettify.check(input, cliOptions));
+                } else {
+                    assert.throws(() => CliPrettify.check(input, cliOptions));
+                }
             });
         }
     });

test/systemTests/resources/blockQuoteNewLineNoTable-expected.md

@@ -0,0 +1,25 @@
+> First line of my note.
+>
+> Second line.
+
+> [!NOTE]
+> First line of my note.
+>
+> ```text
+> some_code
+> ```
+
+# Awesome file
+
+> [!NOTE]
+> First line of my note.
+>
+> ```text
+> some_code
+> ```
+
+Here is a paragraph.
+
+> A marvelous quotation.
+
+Second paragraph.

test/systemTests/resources/blockQuoteNewLineNoTable-input.md

@@ -0,0 +1,25 @@
+> First line of my note.
+>
+> Second line.
+
+> [!NOTE]
+> First line of my note.
+>
+> ```text
+> some_code
+> ```
+
+# Awesome file
+
+> [!NOTE]
+> First line of my note.
+>
+> ```text
+> some_code
+> ```
+
+Here is a paragraph.
+
+> A marvelous quotation.
+
+Second paragraph.