User:Willscrlt/Rndnear/doc

Test cases
 Buggy rndnear :
 * → [4.5678]
 * → [2.3456]
 * → [1.2345]
 * → [0.25]
 *  [Text]  → [Text]

Modified rndnear that returns a blank (like isnumeric) instead of an error
 * → []
 * → []
 * → []
 * → []
 *  []  → []