actions: Specify where a parse error happened for --around

Previously quarg would simply echo the error message without any
context, making it harder to find exactly which option caused it.

1 files changed, 1 insertions, 1 deletions

diff --git a/quarg/actions.py b/quarg/actions.py
index 528d515..990327e 100644
--- a/quarg/actions.py
+++ b/quarg/actions.py
@@ -52,7 +52,7 @@ class ParseAround(argparse.Action):
             try:
                 hour_range = int(rangespec)
             except ValueError as err:
-                errx(err)
+                errx(f'Error when parsing range for --around: {err}')
         else:
             datespec, hour_range = (aroundspec, 12)