[clang-tidy][NFC] fix 'misc-use-internal-linkage' check warnings (#143482)

Run misc-use-internal-linkage check over clang-tidy code. 
Also fixed a couple of other clang-tidy warnings.

Apart from issues in header files, all '.cpp' in
`clang-tools-extra/clang-tidy` must be clang-tidy clear now.

1 files changed, 1 insertions, 1 deletions

diff --git a/clang-tools-extra/clang-tidy/modernize/UseConstraintsCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseConstraintsCheck.cpp
index 6040cdd..9e4d184 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseConstraintsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseConstraintsCheck.cpp
@@ -279,7 +279,7 @@ findInsertionForConstraint(const FunctionDecl *Function, ASTContext &Context) {
   return Body->getBeginLoc();
 }
 
-bool isPrimaryExpression(const Expr *Expression) {
+static bool isPrimaryExpression(const Expr *Expression) {
   // This function is an incomplete approximation of checking whether
   // an Expr is a primary expression. In particular, if this function
   // returns true, the expression is a primary expression. The converse