# diff
output.to_stdout matcher expect { ... }.to_not output\(matcher\).to_stdout fails if the block outputs a string to stdout that passes the given matcher
output.to_stdout matcher expect { ... }.to output\(matcher\).to_stdout fails if the block outputs a string to stdout that does not pass the given matcher
output.to_stdout matcher expect { ... }.to_not output\(/regex/\).to_stdout fails if the block outputs a string to stdout that matches the regex
output.to_stdout matcher expect { ... }.to output\(/regex/\).to_stdout fails if the block outputs a string to stdout that does not match
output.to_stdout matcher expect { ... }.to output\(/regex/\).to_stdout fails if the block does not output to stdout
output.to_stderr matcher expect { ... }.to_not output\(matcher\).to_stderr fails if the block outputs a string to stderr that passes the given matcher
output.to_stderr matcher expect { ... }.to output\(matcher\).to_stderr fails if the block outputs a string to stderr that does not pass the given matcher
output.to_stderr matcher expect { ... }.to_not output\(/regex/\).to_stderr fails if the block outputs a string to stderr that matches the regex
output.to_stderr matcher expect { ... }.to output\(/regex/\).to_stderr fails if the block outputs a string to stderr that does not match
output.to_stderr matcher expect { ... }.to output\(/regex/\).to_stderr fails if the block does not output to stderr

# $VERBOSE global variable
output..* matcher does not produce warnings when the failure message is accessed first