docs(addon-webgl): fix comment typos in TextureAtlas and GlyphRenderer

Correct "transferred", remove duplicate "is", and use "one-off"
instead of "once of" in developer-facing comments.

Co-authored-by: Cursor <cursoragent@cursor.com>

addons/addon-webgl/src/TextureAtlas.ts

@@ -69,7 +69,7 @@ export class TextureAtlas implements ITextureAtlas {
   private _overflowSizePage: AtlasPage | undefined;
 
   private _tmpCanvas: HTMLCanvasElement;
-  // A temporary context that glyphs are drawn to before being transfered to the atlas.
+  // A temporary context that glyphs are drawn to before being transferred to the atlas.
   private _tmpCtx: CanvasRenderingContext2D;
 
   private _workBoundingBox: IBoundingBox = { top: 0, left: 0, bottom: 0, right: 0 };
@@ -152,7 +152,7 @@ export class TextureAtlas implements ITextureAtlas {
   }
 
   private _createNewPage(): AtlasPage {
-    // Try merge the set of the 4 most used pages of the largest size. This is is deferred to a
+    // Try merge the set of the 4 most used pages of the largest size. This is deferred to a
     // microtask to ensure it does not interrupt textures that will be rendered in the current
     // animation frame which would result in blank rendered areas. This is actually not that
     // expensive relative to drawing the glyphs, so there is no need to wait for an idle callback.