91133 Clean up examples, remove section markers and –template args (a: text input, team, framework, a: animation, f: material design, f: scrolling, cla: yes, f: cupertino, d: examples, f: routes, f: gestures, waiting for tree to go green, f: focus)

91389 Conditionally apply clipping in StretchingOverscrollIndicator (a: text input, framework, f: scrolling, cla: yes, waiting for tree to go green, customer: money (g3), will affect goldens)

91409 Enable avoid_redundant_argument_values lint (a: tests, a: text input, team, tool, framework, a: animation, f: material design, a: accessibility, a: internationalization, f: scrolling, cla: yes, f: cupertino, d: examples, f: routes, f: gestures, waiting for tree to go green, f: focus, integration_test)