[en] British English false positives, rule EN_GB_SIMPLE_REPLACE_XX

[MikeUnwalla]

The bold words are correct in BrE.

• [ ] A silk garment drapes nicely over the body.
• [ ] The slowly moving van suddenly accelerated.
• [x] Use three ounces of oatmeal. [https://www.ldoceonline.com/dictionary/oatmeal]
• [x] 1. The pitcher threw the ball very far. 2. A pitcher is a large clay container with two handles. [https://www.ldoceonline.com/dictionary/pitcher]
• [ ] This advertisement is slicker than most.
• [ ] Please don't trash my opinions.

FP caused by lines in en-gb/replace.txt.