old_contents: 'use strict'
  
  const { resolve } = require('path')
  
  // Retrieve error message of a standard error
  const getErrorMessage = function({
    error: { type, description, details },
    message,
  }) {
    // Retrieve both the main message and the stack
    const stack = getStack(description, details)
  
    // Add error type to message
    const errorMessage = stack ? `${type} - ${stack}` : type
  
    // Add original event's message
    const errorMessageA = message ? `${message}\n${errorMessage}` : errorMessage
  
    return errorMessageA
  }
  
  const getStack = function(description, details = '') {
    // Only include description if it's not already in the stack trace
    const stack =
      !description || details.includes(description)
        ? details
        : `${description}\n${details}`
  
    // Remove `Error:` as it gets prepended to `error.stack` (i.e. `details`)
    const stackA = stack.replace(/^[\w]*Error: /u, '')
  
    // Shorten stack trace directory paths
    const dirPrefixRegExp = new RegExp(ROOT_DIR, 'gu')
    const stackB = stackA.replace(dirPrefixRegExp, '')
    return stackB
  }
  
  const ROOT_DIR = resolve(__dirname, '../..')
  
  module.exports = {
    getErrorMessage,
  }
  
new_contents: 'use strict'
  
  const { resolve } = require('path')
  
  // Retrieve error message of a standard error
  const getErrorMessage = function({
    error: { type, description, details },
    message,
  }) {
    // Retrieve both the main message and the stack
    const stack = getStack(description, details)
  
    // Add error type to message
    const errorMessage = stack ? `${type} - ${stack}` : type
  
    // Add original event's message
    const errorMessageA = message ? `${message}\n${errorMessage}` : errorMessage
  
    return errorMessageA
  }
  
  const getStack = function(description, details = '') {
    // Only include description if it's not already in the stack trace
    const stack =
      !description || details.includes(description)
        ? details
        : `${description}\n${details}`
  
    // Remove `Error:` as it gets prepended to `error.stack` (i.e. `details`)
    const stackA = stack.replace(/^[\w]*Error: /u, '')
  
    // Shorten stack trace directory paths
    const stackB = stackA.split(ROOT_DIR).join('')
    return stackB
  }
  
  const ROOT_DIR = resolve(__dirname, '../..')
  
  module.exports = {
    getErrorMessage,
  }
  
subject: Fix stack traces