lib/rules/computed-property-spacing.js
function reportRequiredEndingSpace( node, token ) {
    context.report({
      node: node,
      loc: token.loc.start,
      message: 'A space is required before \'' + token.value + '\'',
      fix: function( fixer ) {
        return fixer.insertTextBefore( token, ' ' );
      }
    });
  }
function reportRequiredEndingSpace( node, token ) {
    context.report({
      node: node,
      loc: token.loc.start,
      message: 'A space is required before \'' + token.value + '\'',
      fix: function( fixer ) {
        return fixer.insertTextBefore( token, ' ' );
      }
    });
  }
function reportRequiredEndingSpace ( node , token ) { context . report ( { node : node , loc : token . loc . start , message : 'A space is required before \'' + token . value + '\'' , fix : function ( fixer ) { return fixer . insertTextBefore ( token , ' ' ) ; } } ) ; }
Reports that there should be a space before the last token
@param {ASTNode} node - The node to report in the event of an error.
@param {Token} token - The token to use for the report.
@returns {void}
Reports that there should be a space before the last token