[clang-tools-extra] [clang-doc] Add option for compact JSON (PR #190822)

[Paul Kirth via cfe-commits]

================
@@ -112,6 +112,10 @@ Turn on time profiler. Generates clang-doc-tracing.json)"),
                                       llvm::cl::init(false),
                                       llvm::cl::cat(ClangDocCategory));
 
+static llvm::cl::opt<bool>
+    Pretty("pretty", llvm::cl::desc("Serialize JSON with whitespace."),
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ilovepi wrote:

```suggestion
    Pretty("pretty-json", llvm::cl::desc("Serialize JSON with whitespace."),
```
Do you think this would be better/harder to get wrong? up to you, as I'm 50/50 on if its better or not.

https://github.com/llvm/llvm-project/pull/190822