response: The Kmer often added a line above the glyph.
original_response: the khmer often added a line above the glyph
history: I really like the number 7. Can you tell me anything about it? It's a natural number preceding 8 and following 6. I think it is a lucky number. Wonder why 7 is associated with luck. Not sure. The Hindus in the beginning wrote 7 in one stroke as a curve. I see. I have seen 7 written with a line through it as well. How interesting. Arabs write it with horizontal upper line. That is what I have seen. So the Arabs started that. I love the arabic numeral system.
knowledge: For the Khmer this often involved adding a horizontal line above the glyph.