🐛 Fix maximum textwidth per line computation

Author: ronisbr

src/misc.jl

@@ -423,22 +423,7 @@ end
 Compute the maximum textwidth per line of the string `str`.
 """
 function _maximum_textwidth_per_line(str::AbstractString)
-    max_tw = 0
-    line_tw = 0
-
-    for c in str
-        if c == '\n'
-            max_tw = max(max_tw, line_tw)
-            line_tw = 0
-        else
-            line_tw += textwidth(c)
-        end
-    end
-
-    # Take into account the last line.
-    max_tw = max(max_tw, line_tw)
-
-    return max_tw
+    return maximum(printable_textwidth_per_line(str))
 end
 
 """