Fix test by using the same isNodeFirstInLine function found in jsx-closing-tag-location rule

Author: jseminck

lib/rules/jsx-indent.js

@@ -159,12 +159,19 @@ module.exports = {
      */
     function isNodeFirstInLine(node) {
       let token = node;
+      let lines;
       do {
         token = sourceCode.getTokenBefore(token);
-      } while (token.type === 'JSXText' && /^\s*$/.test(token.value));
+        lines = token.type === 'JSXText'
+          ? token.value.split('\n')
+          : null;
+      } while (
+        token.type === 'JSXText' &&
+        /^\s*$/.test(lines[lines.length - 1])
+      );
+
       const startLine = node.loc.start.line;
       const endLine = token ? token.loc.end.line : -1;
-
       return startLine !== endLine;
     }