Fix TerminalInteractiveShell.true_color docs

IPython/terminal/interactiveshell.py

@@ -201,10 +201,12 b' class TerminalInteractiveShell(InteractiveShell):'
     ).tag(config=True)
 
     true_color = Bool(False,
-        help=("Use 24bit colors instead of 256 colors in prompt highlighting. "
-              "If your terminal supports true color, the following command "
-              "should print 'TRUECOLOR' in orange: "
-              "printf \"\\x1b[38;2;255;100;0mTRUECOLOR\\x1b[0m\\n\"")
+        help="""Use 24bit colors instead of 256 colors in prompt highlighting.
+        If your terminal supports true color, the following command should
+        print ``TRUECOLOR`` in orange::
+
+            printf \"\\x1b[38;2;255;100;0mTRUECOLOR\\x1b[0m\\n\"
+        """,
     ).tag(config=True)
 
     editor = Unicode(get_default_editor(),