[llvm-cov] Fix a comment, NFC
llvm-svn: 294134
diff --git a/llvm/tools/llvm-cov/CodeCoverage.cpp b/llvm/tools/llvm-cov/CodeCoverage.cpp
index 0a9807a..d4b2aed 100644
--- a/llvm/tools/llvm-cov/CodeCoverage.cpp
+++ b/llvm/tools/llvm-cov/CodeCoverage.cpp
@@ -139,7 +139,7 @@
/// A cache for demangled symbol names.
StringMap<std::string> DemangledNames;
- /// Errors and warnings which have not been printed.
+ /// A lock which guards printing to stderr.
std::mutex ErrsLock;
/// A container for input source file buffers.