message: Small refinement.
diff: @@ -19,8 +19,8 @@ function readCompilerOptions(configPath: string) {
  // First step: Let tsc pick up the config.
  const loaded = tsc.readConfigFile(configPath, file => {
  const read = tsc.sys.readFile(file);
  - // tslint:disable-next-line:max-line-length
  - // See https://github.com/Microsoft/TypeScript/blob/a757e8428410c2196886776785c16f8f0c2a62d9/src/compiler/sys.ts#L203 :
  + // See
  + // https://github.com/Microsoft/TypeScript/blob/a757e8428410c2196886776785c16f8f0c2a62d9/src/compiler/sys.ts#L203 :
  // `readFile` returns `undefined` in case the file does not exist!
  if (!read) {
  throw new Error(
  @@ -196,9 +196,9 @@ export function injectSourcemapHook(
  ): string {
  const start = src.length > 12 ? src.substr(1, 10) : '';
  - const sourceMapHook = `require('ts-jest').install(${JSON.stringify(
  - filePath,
  - )}, ${JSON.stringify(typeScriptCode)})`;
  + const filePathParam = JSON.stringify(filePath);
  + const codeParam = JSON.stringify(typeScriptCode);
  + const sourceMapHook = `require('ts-jest').install(${filePathParam}, ${codeParam})`;
  return start === 'use strict'
  ? `'use strict';${sourceMapHook};${src}`
  