fix(require-hyphen-before-param-description): fixer should insert hyphen in correct line (#176)

Author: jasminexie

src/rules/requireHyphenBeforeParamDescription.js

@@ -26,7 +26,12 @@ export default iterateJsdoc(({
     if (always) {
       if (!jsdocTag.description.startsWith('-')) {
         report('There must be a hyphen before @' + targetTagName + ' description.', (fixer) => {
-          const replacement = sourceCode.getText(jsdocNode).replace(jsdocTag.description, '- ' + jsdocTag.description);
+          const lineIndex = jsdocTag.line;
+          const sourceLines = sourceCode.getText(jsdocNode).split('\n');
+          const replacementLine = sourceLines[lineIndex]
+            .replace(jsdocTag.description, '- ' + jsdocTag.description);
+          sourceLines.splice(lineIndex, 1, replacementLine);
+          const replacement = sourceLines.join('\n');
 
           return fixer.replaceText(jsdocNode, replacement);
         }, jsdocTag);

test/rules/assertions/requireHyphenBeforeParamDescription.js

@@ -51,6 +51,35 @@ export default {
            */
           function quux () {
 
+          }
+      `
+    },
+    {
+      code: `
+          /**
+           * @param foo - Foo.
+           * @param foo Foo.
+           */
+          function quux () {
+
+          }
+      `,
+      errors: [
+        {
+          line: 4,
+          message: 'There must be a hyphen before @param description.'
+        }
+      ],
+      options: [
+        'always'
+      ],
+      output: `
+          /**
+           * @param foo - Foo.
+           * @param foo - Foo.
+           */
+          function quux () {
+
           }
       `
     }