Determines if two numbers are almost equal, based on rounding by significant digits. Does 2 rounds of rounding.
1  | almostEqual(v1, v2, digits, compError = 15)
 | 
v1 | 
 first vector  | 
v2 | 
 second vector  | 
digits | 
 primary rounding digits  | 
compError | 
 digits for computer error (default is 15)  | 
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