If you create a test method and put the open curly brace on the same line as the method definition, the code coverage '>' indicator in the left margin will show up on the line with the method name (and curly brace). If you put the curly brace on the following line then the '>' shows up on the following line and there are no code coverage indicators on the line with the method name.

This problem is greatly amplified when you utilize code outlining to collapse methods down to definitions. Methods that have the curly brace on a new line have no code coverage indicators visible when collapsed so you must uncollapse each method to see if it is green or red.

The same problem occurs for normal code coverage indicators throughout the solution, making it so you cannot glance at an outline-collapsed class and get an idea of which methods have coverage and which do not.