René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Missing whitespace in _axes.py error message","articleBody":"### Bug summary\n\nIn this code from _axes.py:\n\nhttps://github.com/matplotlib/matplotlib/blob/93a421e9c43b8f4a69e64d0615ba20e7f5616670/lib/matplotlib/axes/_axes.py#L2295-L2301\n\nWe see that the error message has been split into two lines, however it is missing a whitespace, resulting in the following typo:\n\n`argument must be a valid color orsequence of colors.`\n\nI would be very happy to tackle this myself as my first matplotlib PR if that's agreeable!\n\n### Code for reproduction\n\n```Python\nimport matplotlib.pyplot as plt\n\n# Create a simple plot\nfig, ax = plt.subplots()\n\n# This will trigger the facecolor error by passing an invalid color\nax.bar([1, 2, 3], [1, 2, 3], facecolor='invalid_color')\n\nplt.show()\n```\n\n### Actual outcome\n\n`ValueError: 'facecolor' or 'color' argument must be a valid color orsequence of colors.`\n\n### Expected outcome\n\n`ValueError: 'facecolor' or 'color' argument must be a valid color or sequence of colors.`\n\n### Additional information\n\n_No response_\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.10.0\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n_No response_\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\nNone","author":{"url":"https://github.com/brchristian","@type":"Person","name":"brchristian"},"datePublished":"2025-07-10T21:39:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/30285/matplotlib/issues/30285"}