fix code formatting in installation instructions
fix code formatting in installation instructions
clab/cnn,danielhers/dynet,danielhers/dynet,danielhers/dynet,clab/dynet,chunyang-wen/dynet,clab/dynet,danielhers/dynet,chunyang-wen/dynet,danielhers/dynet,clab/cnn,shuheik/dynet,clab/dynet,clab/dynet,danielhers/dynet,shuheik/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,chunyang-wen/dynet,clab/dynet,shuheik/dynet,clab/cnn,chunyang-wen/dynet,shuheik/dynet,shuheik/dynet,clab/dynet,clab/dynet