CI output is prefixed by some weird unicode

[leofang]

Snippets from an actual run (don't have a link to Azure because it's washed out, sorry):

    Could not solve for environment specs
    The following packages are incompatible
    \u251c\u2500 cuda-cudart-dev is installable and it requires
    \u2502  \u2514\u2500 cuda-cudart 12.0.107 h63175ca_6, which requires
    \u2502     \u2514\u2500 cuda-cudart_win-64 12.0.107 h63175ca_6, which requires
    \u2502        \u2514\u2500 cuda-version >=12.0,<12.1.0a0 , which requires
    \u2502           \u2514\u2500 cudatoolkit 12.0|12.0.* , which can be installed;
    \u2514\u2500 cudnn >=8.0.*,<9  is not installable because there are no viable options
       \u251c\u2500 cudnn 8.0.5.39 would require
       \u2502  \u2514\u2500 cudatoolkit 10.1|10.1.* , which conflicts with any installable versions previously reported;
       \u251c\u2500 cudnn [8.0.5.39|8.1.0.77|8.2.0.53|8.2.1.32] would require
       \u2502  \u2514\u2500 cudatoolkit [10.2.* |10.2|10.2.* ], which conflicts with any installable versions previously reported;
       \u251c\u2500 cudnn 8.0.5.39 would require
       \u2502  \u2514\u2500 cudatoolkit 11.0|11.0.* , which conflicts with any installable versions previously reported;
       \u251c\u2500 cudnn [8.1.0.77|8.2.0.53|...|8.4.1.50] would require
       \u2502  \u2514\u2500 cudatoolkit 11.* , which conflicts with any installable versions previously reported;
       \u251c\u2500 cudnn [8.3.2.44|8.4.0.27] would require
       \u2502  \u2514\u2500 cudatoolkit >=11.2,<12 , which conflicts with any installable versions previously reported;
       \u2514\u2500 cudnn 8.8.0.121 would require
          \u2514\u2500 cuda-version >=11.0,<12.0a0 , which conflicts with any installable versions previously reported.

Something seems to be off when rendering the output.

[leofang]

cc: @jakirkham for vis