Allow specific Box Drawing UTF characters that are used in Markdown trees in check_files.py
@@ -285,6 +285,7 @@ class UnicodeIssueTracker(LineIssueTracker):
'\u2070\u2071\u2074-\u208E\u2090-\u209C', # Superscripts and Subscripts
'\u2190-\u21FF', # Arrows
'\u2200-\u22FF', # Mathematical Symbols
+ '\u2500 \u2514 \u251C' # Box Drawings characters used in markdown trees
])
# Allow any of the characters and ranges above, and anything classified
# as a word constituent.
