Remove extraneous // LCOV_EXCL_START, and fix CMake warning (#5744)

* Remove extraneous // LCOV_EXCL_START
* Fix "At least one COMMAND must be given" CMake warning

cmake/CodeCoverage.cmake

@@ -101,6 +101,9 @@
 # 2025-05-12, Jingchen Wu
 #     - add -fprofile-update=atomic to ensure atomic profile generation
 #
+# 2025-08-28, Bronek Kozicki
+#     - fix "At least one COMMAND must be given" CMake warning from policy CMP0175
+#
 # USAGE:
 #
 # 1. Copy this file into your cmake modules path.
@@ -446,7 +449,7 @@ function(setup_target_for_coverage_gcovr)
 
     # Show info where to find the report
     add_custom_command(TARGET ${Coverage_NAME} POST_BUILD
-        COMMAND ;
+        COMMAND echo
         COMMENT "Code coverage report saved in ${GCOVR_OUTPUT_FILE} formatted as ${Coverage_FORMAT}"
     )
 endfunction() # setup_target_for_coverage_gcovr

src/xrpld/ledger/detail/View.cpp

@@ -3074,7 +3074,6 @@ rippleUnlockEscrowMPT(
         auto const delta = amount.mpt().value();
 
         // Underflow check for subtraction
-        // LCOV_EXCL_START
         if (!canSubtract(STAmount(mptIssue, locked), STAmount(mptIssue, delta)))
         {  // LCOV_EXCL_START
             JLOG(j.error())