Addressed eslint issues

Author: caroline223

lib/rules/jsx-indent.js

@@ -168,10 +168,8 @@ module.exports = {
      * @return {Number} Indent
      */
     function getNodeIndent(node, byLastLine, excludeCommas) {
-      let finalLine = byLastLine;
-      let noCommas = excludeCommas;
-      finalLine = finalLine || false;
-      noCommas = noCommas || false;
+      const finalLine = !!byLastLine;
+      const noCommas = !!excludeCommas;
 
       let src = context.getSourceCode().getText(node, node.loc.start.column + extraColumnStart);
       const lines = src.split('\n');