code: function createParagraph(nodes) {
      const firstNode = nodes[0];
      const lastNode = nodes[nodes.length - 1];
      return {
          type: Syntax.Paragraph,
          raw: nodes
              .map(function(node) {
                  return node.raw;
              })
              .join(""),
          range: [firstNode.range[0], lastNode.range[1]],
          loc: {
              start: {
                  line: firstNode.loc.start.line,
                  column: firstNode.loc.start.column
              },
              end: {
                  line: lastNode.loc.end.line,
                  column: lastNode.loc.end.column
              }
          },
          children: nodes
      };
  }
docs: create paragraph node from TxtNodes
  @param {[TxtNode]} nodes
  @returns {TxtNode} Paragraph node