Created IPythonPTLexer, which is a wrapper around BashLexer and PythonLexer. (When the input starts with an exclamation mark, use the BashLexer.)
Created IPythonPTLexer, which is a wrapper around BashLexer and PythonLexer. (When the input starts with an exclamation mark, use the BashLexer.)

ipython/ipython,ipython/ipython