Naming, layout and comments: descriptive full-word names, one item per line in wrapped calls and literals, and doc comments on exported names

Short and single-letter names in application code become full words (tests
keep theirs). Wrapped calls, signatures and composite literals put one item
per line, and one-line function bodies are expanded. Exported names and
groups of constants get doc comments, and comments refer to the renamed
identifiers.

internal/config/load_test.go

@@ -22,7 +22,9 @@ func initDir(t *testing.T, env []string, config string) string {
 		// godotenv sets variables without cleaning up after the test.
 		for _, kv := range env {
 			key, _, _ := strings.Cut(kv, "=")
-			t.Cleanup(func() { os.Unsetenv(key) })
+			t.Cleanup(func() {
+				os.Unsetenv(key)
+			})
 		}
 		writeFile(t, filepath.Join(dir, ".env"), strings.Join(env, "\n")+"\n")
 	}
@@ -108,7 +110,11 @@ func TestInitKeepsCommandLineLevel(t *testing.T) {
 			initDir(t, []string{}, "logging:\n  level: info\n")
 			logs := captureLogs(t, slog.LevelDebug)
 
-			conf := JobSearchConfig{Logging: JSCLogging{Level: level}}
+			conf := JobSearchConfig{
+				Logging: JSCLogging{
+					Level: level,
+				},
+			}
 			if err := Init("", &conf); err != nil {
 				t.Fatal(err)
 			}