Apply suggestions from code review

Co-authored-by: Wesley Wiser <wwiser@gmail.com>

compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs

@@ -169,7 +169,7 @@ impl CoverageMapGenerator {
         );
 
         // Create the coverage data header (Note, fields 0 and 2 are now always zero,
-        // as of `llvm::coverage::CovMapVersion::Version4`.
+        // as of `llvm::coverage::CovMapVersion::Version4`.)
         let zero_was_n_records_val = cx.const_u32(0);
         let filenames_size_val = cx.const_u32(filenames_size as u32);
         let zero_was_coverage_size_val = cx.const_u32(0);

src/test/run-make-fulldeps/coverage-llvmir-base/Makefile

@@ -56,7 +56,7 @@ else
 		-DINSTR_PROF_ORDERFILE='$(DATA_SECTION_PREFIX)__llvm_orderfile'
 endif
 
-ifeq ($(LLVM_VERSION_11_PLUS),false)
+ifeq ($(LLVM_VERSION_11_PLUS),true)
 all: test_llvm_ir
 else
 $(info Rust option `-Z instrument-coverage` requires LLVM 11 or higher. Test skipped.)