restore original comparison

Author: scottshambaugh

labellines/core.py

@@ -210,7 +210,7 @@ def labelLines(
             minx, maxx = min(xdata), max(xdata)
             for j, xv in enumerate(xvals):  # type: ignore
                 xv = line.convert_xunits(xv)
-                ok_matrix[i, j] = minx <= xv <= maxx
+                ok_matrix[i, j] = minx < xv < maxx
 
         # If some xvals do not fall in their corresponding line,
         # find a better matching using maximum bipartite matching.