read a txt file into a list and replace \n to space

def readIntoList():
    with open('C:\Users\xxx\Desktop\xxx\xxx.txt','r') as f:
        li = []
        line = f.readline()
        while line:
            #print(line)
            line = line.replace('\n','')
            line = line.replace('  ',' ')
            line = line.replace('   ',' ')
            li.append(line)
            line = f.readline()
        f.close()
    return li