message: Fixed perspective of expect messages
diff: @@ -23,14 +23,14 @@ pub fn export(coverage_data: &TraceMap, _config: &Config) {
  for (path, traces) in coverage_data.iter() {
  report.files.push(SourceFile {
  path: path.components().map(|c| c.as_os_str().to_string_lossy().to_string()).collect(),
  - content: read_to_string(path).expect("Source file exists and is a text"),
  + content: read_to_string(path).expect("Unable to read source file to string"),
  traces: traces.clone(),
  covered: coverage_data.covered_in_path(path),
  coverable: coverage_data.coverable_in_path(path),
  });
  }
  - let mut file = File::create("tarpaulin-report.html").expect("File is writable");
  + let mut file = File::create("tarpaulin-report.html").expect("File is not writable");
  write!(file, r##"<!doctype html>
  <html>
  <head>
  @@ -46,7 +46,7 @@ pub fn export(coverage_data: &TraceMap, _config: &Config) {
  </body>
  </html>"##,
  include_str!("report_viewer.css"),
  - serde_json::to_string(&report).expect("Report is serializable"),
  + serde_json::to_string(&report).expect("Report isn't serializable"),
  include_str!("report_viewer.js")
  - ).expect("Report is written");
  + ).expect("Failed to write Html report");
  }
  