Set up copybutton options to exclude prompts and output (#1756)

Author: josh146

doc/conf.py

@@ -139,6 +139,9 @@ def __getattr__(cls, name):
 
 intersphinx_mapping = {"pennylane": ("https://docs.pennylane.ai/en/stable/", None)}
 
+copybutton_prompt_text = r">>> |\.\.\. |\$ |In \[\d*\]: | {2,5}\.\.\.: | {5,8}: "
+copybutton_prompt_is_regexp = True
+
 # add the custom MLIR Lexer
 lexers["mlir"] = MLIRLexer(startinline=True)