Merge pull request #13287 from ethereum/bettercmdlineHelp

Document in ``solc --help`` usage of ``--metadata`` better.

Author: Marenz

solc/CommandLineParser.cpp

@@ -565,7 +565,7 @@ General Information)").c_str(),
 		(
 			(g_strOutputDir + ",o").c_str(),
 			po::value<string>()->value_name("path"),
-			"If given, creates one file per component and contract/file at the specified directory."
+			"If given, creates one file per output component and contract/file at the specified directory."
 		)
 		(
 			g_strOverwrite.c_str(),
@@ -718,7 +718,7 @@ General Information)").c_str(),
 		(CompilerOutputs::componentName(&CompilerOutputs::signatureHashes).c_str(), "Function signature hashes of the contracts.")
 		(CompilerOutputs::componentName(&CompilerOutputs::natspecUser).c_str(), "Natspec user documentation of all contracts.")
 		(CompilerOutputs::componentName(&CompilerOutputs::natspecDev).c_str(), "Natspec developer documentation of all contracts.")
-		(CompilerOutputs::componentName(&CompilerOutputs::metadata).c_str(), "Combined Metadata JSON whose Swarm hash is stored on-chain.")
+		(CompilerOutputs::componentName(&CompilerOutputs::metadata).c_str(), "Combined Metadata JSON whose IPFS hash is stored on-chain.")
 		(CompilerOutputs::componentName(&CompilerOutputs::storageLayout).c_str(), "Slots, offsets and types of the contract's state variables.")
 	;
 	desc.add(outputComponents);