db/migrate/20090923103450_create_system_operations.rb
CreateSystemOperations#self.up has the variable name 't' Open
Open
create_table :system_operations do |t|
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An Uncommunicative Variable Name
is a variable name that doesn't communicate its intent well enough.
Poor names make it hard for the reader to build a mental picture of what's going on in the code. They can also be mis-interpreted; and they hurt the flow of reading, because the reader must slow down to interpret the names.