Emphasize that callsite_filename also works in the REPL

Technologicat · Technologicat · commit 89fe552ac28e · 2020-08-20T20:51:10.000+03:00
diff --git a/unpythonic/misc.py b/unpythonic/misc.py
@@ -772,6 +772,9 @@ def callsite_filename():
     """Return the filename of the call site, as a string.
 
     Useful as a building block for debug utilities and similar.
+
+    The filename is grabbed from the call stack using `inspect`.
+    This works also in the REPL (where `__file__` is undefined).
     """
     stack = inspect.stack()
     frame = stack[1].frame
