fix(newline-afer-description): when finding last description line, don't look beyond the length of the description.

The previous check for the last description line was redundant and problematic.
The search for the last line was mistakenly checking for the last match within the full comment, so if the last line of the
description were duplicated later, that position was used, and since that position couldn't be find within the
`comment-parser` description, there would be an error. It was also mistakenly stripping carriage returns in part
of the comparison when there could be carriage returns in the other part.

Author: brettz9

README.md

@@ -4326,6 +4326,18 @@ function quux () {
 // Options: ["always"]
 // Message: There must be a newline after the description of the JSDoc block.
 
+/**
+ * Foo.
+ * @foo
+ *
+ * Foo.
+ */
+function quux () {
+
+}
+// Options: ["always"]
+// Message: There must be a newline after the description of the JSDoc block.
+
 /**
  * Foo.
  *
@@ -4346,6 +4358,19 @@ function quux () {
  */
 function quux () {
 
+}
+// Options: ["never"]
+// Message: There must be no newline after the description of the JSDoc block.
+
+/**
+ * Bar.
+ *
+ * @bar
+ *
+ * Bar.
+ */
+function quux () {
+
 }
 // Options: ["never"]
 // Message: There must be no newline after the description of the JSDoc block.

src/rules/newlineAfterDescription.js

@@ -26,9 +26,8 @@ export default iterateJsdoc(({
   if (always) {
     if (!descriptionEndsWithANewline) {
       const sourceLines = sourceCode.getText(jsdocNode).split('\n');
-      const lastDescriptionLine = _.findLastIndex(sourceLines, (line) => {
-        return line.replace(/^\s*\*\s*/u, '') === _.last(jsdoc.description.split('\n'));
-      });
+      const splitDesc = jsdoc.description.split('\n');
+      const lastDescriptionLine = splitDesc.length - 1;
       report('There must be a newline after the description of the JSDoc block.', (fixer) => {
         // Add the new line
         const injectedLine = `${indent} *` +
@@ -42,9 +41,8 @@ export default iterateJsdoc(({
     }
   } else if (descriptionEndsWithANewline) {
     const sourceLines = sourceCode.getText(jsdocNode).split('\n');
-    const lastDescriptionLine = _.findLastIndex(sourceLines, (line) => {
-      return line.replace(/^\s*\*\s*/u, '') === _.last(jsdoc.description.split('\n'));
-    });
+    const splitDesc = jsdoc.description.split('\n');
+    const lastDescriptionLine = splitDesc.length - 1;
     report('There must be no newline after the description of the JSDoc block.', (fixer) => {
       // Remove the extra line
       sourceLines.splice(lastDescriptionLine, 1);

test/rules/assertions/newlineAfterDescription.js

@@ -34,6 +34,40 @@ export default {
           }
       `,
     },
+    {
+      code: `
+          /**
+           * Foo.
+           * @foo
+           *
+           * Foo.
+           */
+          function quux () {
+
+          }
+      `,
+      errors: [
+        {
+          line: 3,
+          message: 'There must be a newline after the description of the JSDoc block.',
+        },
+      ],
+      options: [
+        'always',
+      ],
+      output: `
+          /**
+           * Foo.
+           *
+           * @foo
+           *
+           * Foo.
+           */
+          function quux () {
+
+          }
+      `,
+    },
     {
       code: `
           /**
@@ -99,6 +133,40 @@ export default {
           }
       `,
     },
+    {
+      code: `
+          /**
+           * Bar.
+           *
+           * @bar
+           *
+           * Bar.
+           */
+          function quux () {
+
+          }
+      `,
+      errors: [
+        {
+          line: 4,
+          message: 'There must be no newline after the description of the JSDoc block.',
+        },
+      ],
+      options: [
+        'never',
+      ],
+      output: `
+          /**
+           * Bar.
+           * @bar
+           *
+           * Bar.
+           */
+          function quux () {
+
+          }
+      `,
+    },
     {
       code: `\r
           /**\r