Merge #10479: [trivial] Fix comment for ForceSetArg()

42a83e5 [trivial] Fix comment for ForceSetArg() (John Newbery)

Tree-SHA512: 596db8b4bb01bca18908e254e5b364d3d4fcb0ea49d7d54314c65106e497efed65a877d80740bff88e090aeb772be1e46d4571ecca9b9263578f3f680f0bd0ce

Author: laanwj

src/util.h

@@ -241,7 +241,8 @@ bool SoftSetArg(const std::string& strArg, const std::string& strValue);
  */
 bool SoftSetBoolArg(const std::string& strArg, bool fValue);
 
-// Forces a arg setting, used only in testing
+// Forces an arg setting. Called by SoftSetArg() if the arg hasn't already
+// been set. Also called directly in testing.
 void ForceSetArg(const std::string& strArg, const std::string& strValue);
 };