General Motors debuted a new logo meant to convey the automaker’s renewed commitment to the production and sale of electric vehicles. The company is also launching a new marketing campaign to underscore that commitment, as it seeks to compete with Tesla and other automakers that are rushing new EVs to market. It’s been about a decade since GM has last tweaked its logo, but this update represents the starkest change in the company’s 113-year history. The most obvious change is the use of a lowercase “gm” in the logo, after previously only using capital letters. The underline has been shortened...