Hi,
I think there is a grammar error in this sentence in https://www.gnu.org/software/bash/manual/html_node/Conditional-Constructs.html "but double quote characters in expression are not treated specially are removed." This sentence should be changed to "but double quote characters in expression are not treated specially and are removed." The same sentence is also in https://www.gnu.org/software/bash/manual/html_node/Arithmetic-Expansion.html. But the grammar in latter is correct. Best regards! Joshua LU